814439220 has 48 divisors (see below), whose sum is σ = 2606206848. Its totient is φ = 186157440.

The previous prime is 814439209. The next prime is 814439233. The reversal of 814439220 is 22934418.

It is a super-2 number, since 2×814439220² = 1326622486148416800, which contains 22 as substring.

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, 969151 + ... + 969990.

It is an arithmetic number, because the mean of its divisors is an integer number (54295976).

Almost surely, 2^814439220 is an apocalyptic number.

It is an amenable number.

814439220 is an abundant number, since it is smaller than the sum of its proper divisors (1791767628).

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

814439220 is a wasteful number, since it uses less digits than its factorization.

814439220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1939160 (or 1939158 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 814439220 is about 28538.3815238356. The cubic root of 814439220 is about 933.8695747830.

The spelling of 814439220 in words is "eight hundred fourteen million, four hundred thirty-nine thousand, two hundred twenty".