30840902136 has 192 divisors, whose sum is σ = 94428828000. Its totient is φ = 9007595520.

The previous prime is 30840902117. The next prime is 30840902137. The reversal of 30840902136 is 63120904803.

30840902136 is a `hidden beast` number, since 30 + 8 + 409 + 0 + 213 + 6 = 666.

It is a super-2 number, since 2×30840902136² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 30840902136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30840902137) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21887800 + ... + 21889208.

Almost surely, 2^30840902136 is an apocalyptic number.

30840902136 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30840902136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47214414000).

30840902136 is an abundant number, since it is smaller than the sum of its proper divisors (63587925864).

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

30840902136 is a wasteful number, since it uses less digits than its factorization.

30840902136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2414 (or 2407 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The spelling of 30840902136 in words is "thirty billion, eight hundred forty million, nine hundred two thousand, one hundred thirty-six".