212956890 has 32 divisors (see below), whose sum is σ = 512493696. Its totient is φ = 56633280.

The previous prime is 212956879. The next prime is 212956907. The reversal of 212956890 is 98659212.

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, 1675 + ... + 20705.

It is an arithmetic number, because the mean of its divisors is an integer number (16015428).

Almost surely, 2^212956890 is an apocalyptic number.

212956890 is an abundant number, since it is smaller than the sum of its proper divisors (299536806).

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

212956890 is a wasteful number, since it uses less digits than its factorization.

212956890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19414.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 212956890 is about 14593.0425203245. The cubic root of 212956890 is about 597.1689686674.

The spelling of 212956890 in words is "two hundred twelve million, nine hundred fifty-six thousand, eight hundred ninety".