212856340 has 24 divisors (see below), whose sum is σ = 447455232. Its totient is φ = 85055520.

The previous prime is 212856313. The next prime is 212856349. The reversal of 212856340 is 43658212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212856349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16845 + ... + 26635.

It is an arithmetic number, because the mean of its divisors is an integer number (18643968).

Almost surely, 2^212856340 is an apocalyptic number.

212856340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212856340 is an abundant number, since it is smaller than the sum of its proper divisors (234598892).

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

212856340 is a wasteful number, since it uses less digits than its factorization.

212856340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10887 (or 10885 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 212856340 is about 14589.5969786694. The cubic root of 212856340 is about 597.0749671810.

The spelling of 212856340 in words is "two hundred twelve million, eight hundred fifty-six thousand, three hundred forty".