212780304 has 80 divisors (see below), whose sum is σ = 666296640. Its totient is φ = 64477440.

The previous prime is 212780299. The next prime is 212780333. The reversal of 212780304 is 403087212.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17637 + ... + 27140.

It is an arithmetic number, because the mean of its divisors is an integer number (8328708).

Almost surely, 2^212780304 is an apocalyptic number.

212780304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

212780304 is an abundant number, since it is smaller than the sum of its proper divisors (453516336).

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

212780304 is a wasteful number, since it uses less digits than its factorization.

212780304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44805 (or 44793 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 212780304 is about 14586.9909165667. The cubic root of 212780304 is about 597.0038635138.

The spelling of 212780304 in words is "two hundred twelve million, seven hundred eighty thousand, three hundred four".