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38208031 = 199972017
BaseRepresentation
bin1001000111000…
…0001000011111
32122220011120021
42101300020133
534240124111
63442533011
7642522451
oct221601037
978804507
1038208031
111a627294
1210967167
137bba004
1451082d1
15354ad71
hex247021f

38208031 has 8 divisors (see below), whose sum is σ = 40279280. Its totient is φ = 36142848.

The previous prime is 38208029. The next prime is 38208041. The reversal of 38208031 is 13080283.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 38208031 - 21 = 38208029 is a prime.

It is a super-2 number, since 2×382080312 = 2919707265793922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 38207987 and 38208005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38208041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17935 + ... + 19951.

It is an arithmetic number, because the mean of its divisors is an integer number (5034910).

Almost surely, 238208031 is an apocalyptic number.

38208031 is a deficient number, since it is larger than the sum of its proper divisors (2071249).

38208031 is a wasteful number, since it uses less digits than its factorization.

38208031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3033.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 38208031 is about 6181.2645146442. The cubic root of 38208031 is about 336.8099290079.

The spelling of 38208031 in words is "thirty-eight million, two hundred eight thousand, thirty-one".

Divisors: 1 19 997 2017 18943 38323 2010949 38208031