30457857492 has 240 divisors, whose sum is σ = 90041656320. Its totient is φ = 8926848000.

The previous prime is 30457857491. The next prime is 30457857511. The reversal of 30457857492 is 29475875403.

It is a happy number.

30457857492 is a `hidden beast` number, since 30 + 4 + 5 + 78 + 57 + 492 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30457857491) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 4948617 + ... + 4954767.

It is an arithmetic number, because the mean of its divisors is an integer number (375173568).

Almost surely, 2^30457857492 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30457857492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45020828160).

30457857492 is an abundant number, since it is smaller than the sum of its proper divisors (59583798828).

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

30457857492 is a wasteful number, since it uses less digits than its factorization.

30457857492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6244 (or 6233 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 54.

The spelling of 30457857492 in words is "thirty billion, four hundred fifty-seven million, eight hundred fifty-seven thousand, four hundred ninety-two".