212299740 has 72 divisors (see below), whose sum is σ = 681866640. Its totient is φ = 53282304.

The previous prime is 212299709. The next prime is 212299771. The reversal of 212299740 is 47992212.

It is an interprime number because it is at equal distance from previous prime (212299709) and next prime (212299771).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 212299695 and 212299704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31630 + ... + 37749.

It is an arithmetic number, because the mean of its divisors is an integer number (9470370).

Almost surely, 2^212299740 is an apocalyptic number.

212299740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212299740 is an abundant number, since it is smaller than the sum of its proper divisors (469566900).

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

212299740 is a wasteful number, since it uses less digits than its factorization.

212299740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69411 (or 69406 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 212299740 is about 14570.5092567144. The cubic root of 212299740 is about 596.5540806198.

The spelling of 212299740 in words is "two hundred twelve million, two hundred ninety-nine thousand, seven hundred forty".