212489928 has 48 divisors (see below), whose sum is σ = 657708480. Its totient is φ = 60711264.

The previous prime is 212489917. The next prime is 212489947. The reversal of 212489928 is 829984212.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

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 11 ways as a sum of consecutive naturals, for example, 210300 + ... + 211307.

It is an arithmetic number, because the mean of its divisors is an integer number (13702260).

Almost surely, 2^212489928 is an apocalyptic number.

212489928 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

212489928 is an abundant number, since it is smaller than the sum of its proper divisors (445218552).

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

212489928 is a wasteful number, since it uses less digits than its factorization.

212489928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421626 (or 421619 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 212489928 is about 14577.0342662697. The cubic root of 212489928 is about 596.7321677655.

The spelling of 212489928 in words is "two hundred twelve million, four hundred eighty-nine thousand, nine hundred twenty-eight".