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30835097680 = 245385438721
BaseRepresentation
bin11100101101111010…
…100100000001010000
32221120221200021000211
4130231322210001100
51001122241111210
622055423053504
72141060001652
oct345572440120
987527607024
1030835097680
1112093677302
125b86741294
132ba53b633a
1416c730c6d2
15c070d538a
hex72dea4050

30835097680 has 20 divisors (see below), whose sum is σ = 71691602292. Its totient is φ = 12334039040.

The previous prime is 30835097677. The next prime is 30835097693. The reversal of 30835097680 is 8679053803.

It can be written as a sum of positive squares in 2 ways, for example, as 11370383424 + 19464714256 = 106632^2 + 139516^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-3 number, since 3×308350976803 (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192719281 + ... + 192719440.

Almost surely, 230835097680 is an apocalyptic number.

It is an amenable number.

30835097680 is an abundant number, since it is smaller than the sum of its proper divisors (40856504612).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30835097680 is a wasteful number, since it uses less digits than its factorization.

30835097680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385438734 (or 385438728 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 30835097680 in words is "thirty billion, eight hundred thirty-five million, ninety-seven thousand, six hundred eighty".

Divisors: 1 2 4 5 8 10 16 20 40 80 385438721 770877442 1541754884 1927193605 3083509768 3854387210 6167019536 7708774420 15417548840 30835097680