814621916 has 12 divisors (see below), whose sum is σ = 1425988200. Its totient is φ = 407196720.

The previous prime is 814621891. The next prime is 814621921. The reversal of 814621916 is 619126418.

It is a super-2 number, since 2×814621916² = 1327217732055022112, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 814621916.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11366 + ... + 41933.

It is an arithmetic number, because the mean of its divisors is an integer number (118832350).

Almost surely, 2^814621916 is an apocalyptic number.

It is an amenable number.

814621916 is a deficient number, since it is larger than the sum of its proper divisors (611366284).

814621916 is a wasteful number, since it uses less digits than its factorization.

814621916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57124 (or 57122 counting only the distinct ones).

The product of its digits is 20736, while the sum is 38.

The square root of 814621916 is about 28541.5822266391. The cubic root of 814621916 is about 933.9393984832.

The spelling of 814621916 in words is "eight hundred fourteen million, six hundred twenty-one thousand, nine hundred sixteen".