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38808850885 = 572158403473
BaseRepresentation
bin100100001001001100…
…000001000111000101
310201011122200220002121
4210021030001013011
51113440031212020
625454544205541
72542501534600
oct441114010705
9121148626077
1038808850885
1115505648092
1276310098b1
1338763698bc
141c42303337
151022148baa
hex9093011c5

38808850885 has 12 divisors (see below), whose sum is σ = 54173988108. Its totient is φ = 26611783296.

The previous prime is 38808850867. The next prime is 38808850903. The reversal of 38808850885 is 58805880883.

It is an interprime number because it is at equal distance from previous prime (38808850867) and next prime (38808850903).

It can be written as a sum of positive squares in 2 ways, for example, as 17482921729 + 21325929156 = 132223^2 + 146034^2 .

It is not a de Polignac number, because 38808850885 - 25 = 38808850853 is a prime.

It is a super-2 number, since 2×388088508852 (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79201492 + ... + 79201981.

It is an arithmetic number, because the mean of its divisors is an integer number (4514499009).

Almost surely, 238808850885 is an apocalyptic number.

38808850885 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

38808850885 is a deficient number, since it is larger than the sum of its proper divisors (15365137223).

38808850885 is a wasteful number, since it uses less digits than its factorization.

38808850885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158403492 (or 158403485 counting only the distinct ones).

The product of its (nonzero) digits is 19660800, while the sum is 61.

The spelling of 38808850885 in words is "thirty-eight billion, eight hundred eight million, eight hundred fifty thousand, eight hundred eighty-five".

Divisors: 1 5 7 35 49 245 158403473 792017365 1108824311 5544121555 7761770177 38808850885