212918380 has 12 divisors (see below), whose sum is σ = 447128640. Its totient is φ = 85167344.

The previous prime is 212918369. The next prime is 212918399. The reversal of 212918380 is 83819212.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5322940 + ... + 5322979.

It is an arithmetic number, because the mean of its divisors is an integer number (37260720).

Almost surely, 2^212918380 is an apocalyptic number.

212918380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212918380 is an abundant number, since it is smaller than the sum of its proper divisors (234210260).

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

212918380 is a wasteful number, since it uses less digits than its factorization.

212918380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10645928 (or 10645926 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 212918380 is about 14591.7229962743. The cubic root of 212918380 is about 597.1329702026.

The spelling of 212918380 in words is "two hundred twelve million, nine hundred eighteen thousand, three hundred eighty".