814440920 has 32 divisors (see below), whose sum is σ = 1834330320. Its totient is φ = 325449600.

The previous prime is 814440917. The next prime is 814440937. The reversal of 814440920 is 29044418.

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 7 ways as a sum of consecutive naturals, for example, 32354 + ... + 51726.

Almost surely, 2^814440920 is an apocalyptic number.

It is an amenable number.

814440920 is an abundant number, since it is smaller than the sum of its proper divisors (1019889400).

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

814440920 is a wasteful number, since it uses less digits than its factorization.

814440920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20435 (or 20431 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 814440920 is about 28538.4113082701. The cubic root of 814440920 is about 933.8702245459.

The spelling of 814440920 in words is "eight hundred fourteen million, four hundred forty thousand, nine hundred twenty".