30787125840 has 160 divisors (see below), whose sum is σ = 106115708160. Its totient is φ = 8204391936.

The previous prime is 30787125829. The next prime is 30787125881. The reversal of 30787125840 is 4852178703.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3985662 + ... + 3993378.

It is an arithmetic number, because the mean of its divisors is an integer number (663223176).

Almost surely, 2^30787125840 is an apocalyptic number.

30787125840 is a gapful number since it is divisible by the number (30) 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 30787125840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53057854080).

30787125840 is an abundant number, since it is smaller than the sum of its proper divisors (75328582320).

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

30787125840 is a wasteful number, since it uses less digits than its factorization.

30787125840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9586 (or 9574 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The spelling of 30787125840 in words is "thirty billion, seven hundred eighty-seven million, one hundred twenty-five thousand, eight hundred forty".