212746780 has 24 divisors (see below), whose sum is σ = 466193952. Its totient is φ = 81398592.

The previous prime is 212746777. The next prime is 212746783. The reversal of 212746780 is 87647212.

It is an interprime number because it is at equal distance from previous prime (212746777) and next prime (212746783).

It is a super-2 number, since 2×212746780² = 90522384800736800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212746783) 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, 230787 + ... + 231706.

It is an arithmetic number, because the mean of its divisors is an integer number (19424748).

Almost surely, 2^212746780 is an apocalyptic number.

212746780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212746780 is an abundant number, since it is smaller than the sum of its proper divisors (253447172).

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

212746780 is a wasteful number, since it uses less digits than its factorization.

212746780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462525 (or 462523 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 212746780 is about 14585.8417652188. The cubic root of 212746780 is about 596.9725087811.

The spelling of 212746780 in words is "two hundred twelve million, seven hundred forty-six thousand, seven hundred eighty".