30812512 has 48 divisors (see below), whose sum is σ = 63504000. Its totient is φ = 14699520.

The previous prime is 30812491. The next prime is 30812513. The reversal of 30812512 is 21521803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30812513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88114 + ... + 88462.

It is an arithmetic number, because the mean of its divisors is an integer number (1323000).

Almost surely, 2^30812512 is an apocalyptic number.

30812512 is a gapful number since it is divisible by the number (32) 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 30812512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31752000).

30812512 is an abundant number, since it is smaller than the sum of its proper divisors (32691488).

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

30812512 is a wasteful number, since it uses less digits than its factorization.

30812512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479 (or 471 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 30812512 is about 5550.9019086992. The cubic root of 30812512 is about 313.5034818549.

The spelling of 30812512 in words is "thirty million, eight hundred twelve thousand, five hundred twelve".