890521220 has 48 divisors (see below), whose sum is σ = 1942375680. Its totient is φ = 342699264.

The previous prime is 890521213. The next prime is 890521277. The reversal of 890521220 is 22125098.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47432 + ... + 63488.

It is an arithmetic number, because the mean of its divisors is an integer number (40466160).

Almost surely, 2^890521220 is an apocalyptic number.

It is an amenable number.

890521220 is an abundant number, since it is smaller than the sum of its proper divisors (1051854460).

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

890521220 is a wasteful number, since it uses less digits than its factorization.

890521220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16172 (or 16170 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 890521220 is about 29841.6021687844. The cubic root of 890521220 is about 962.0879108462.

The spelling of 890521220 in words is "eight hundred ninety million, five hundred twenty-one thousand, two hundred twenty".