812605388 has 12 divisors (see below), whose sum is σ = 1625210832. Its totient is φ = 348259440.

The previous prime is 812605373. The next prime is 812605399. The reversal of 812605388 is 883506218.

812605388 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14510783 + ... + 14510838.

It is an arithmetic number, because the mean of its divisors is an integer number (135434236).

Almost surely, 2^812605388 is an apocalyptic number.

It is an amenable number.

812605388 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

812605388 is a wasteful number, since it uses less digits than its factorization.

812605388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29021632 (or 29021630 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 41.

The square root of 812605388 is about 28506.2341953475. The cubic root of 812605388 is about 933.1681322689.

The spelling of 812605388 in words is "eight hundred twelve million, six hundred five thousand, three hundred eighty-eight".