30897286752 has 48 divisors (see below), whose sum is σ = 85876286832. Its totient is φ = 9693265920.

The previous prime is 30897286751. The next prime is 30897286787. The reversal of 30897286752 is 25768279803.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 30897286692 and 30897286701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30897286751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9464449 + ... + 9467712.

It is an arithmetic number, because the mean of its divisors is an integer number (1789089309).

Almost surely, 2^30897286752 is an apocalyptic number.

30897286752 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

30897286752 is an abundant number, since it is smaller than the sum of its proper divisors (54979000080).

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

30897286752 is a wasteful number, since it uses less digits than its factorization.

30897286752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18932191 (or 18932183 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 57.

The spelling of 30897286752 in words is "thirty billion, eight hundred ninety-seven million, two hundred eighty-six thousand, seven hundred fifty-two".