212834740 has 12 divisors (see below), whose sum is σ = 446952996. Its totient is φ = 85133888.

The previous prime is 212834723. The next prime is 212834749. The reversal of 212834740 is 47438212.

It can be written as a sum of positive squares in 2 ways, for example, as 143712144 + 69122596 = 11988^2 + 8314^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212834749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5320849 + ... + 5320888.

It is an arithmetic number, because the mean of its divisors is an integer number (37246083).

Almost surely, 2^212834740 is an apocalyptic number.

212834740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212834740 is an abundant number, since it is smaller than the sum of its proper divisors (234118256).

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

212834740 is a wasteful number, since it uses less digits than its factorization.

212834740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10641746 (or 10641744 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 212834740 is about 14588.8567064044. The cubic root of 212834740 is about 597.0547700603.

It can be divided in two parts, 2128 and 34740, that multiplied together give a triangular number (73926720 = T₁₂₁₅₉).

The spelling of 212834740 in words is "two hundred twelve million, eight hundred thirty-four thousand, seven hundred forty".