812381916 has 48 divisors (see below), whose sum is σ = 1962254336. Its totient is φ = 261382464.

The previous prime is 812381903. The next prime is 812381971. The reversal of 812381916 is 619183218.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49185 + ... + 63591.

Almost surely, 2^812381916 is an apocalyptic number.

It is an amenable number.

812381916 is an abundant number, since it is smaller than the sum of its proper divisors (1149872420).

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

812381916 is a wasteful number, since it uses less digits than its factorization.

812381916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14578 (or 14576 counting only the distinct ones).

The product of its digits is 20736, while the sum is 39.

The square root of 812381916 is about 28502.3142218312. The cubic root of 812381916 is about 933.0825819016.

The spelling of 812381916 in words is "eight hundred twelve million, three hundred eighty-one thousand, nine hundred sixteen".