212262780 has 24 divisors (see below), whose sum is σ = 594335952. Its totient is φ = 56603392.

The previous prime is 212262779. The next prime is 212262793. The reversal of 212262780 is 87262212.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1768797 + ... + 1768916.

It is an arithmetic number, because the mean of its divisors is an integer number (24763998).

Almost surely, 2^212262780 is an apocalyptic number.

212262780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212262780 is an abundant number, since it is smaller than the sum of its proper divisors (382073172).

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

212262780 is a wasteful number, since it uses less digits than its factorization.

212262780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3537725 (or 3537723 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 212262780 is about 14569.2408861958. The cubic root of 212262780 is about 596.5194598859.

The spelling of 212262780 in words is "two hundred twelve million, two hundred sixty-two thousand, seven hundred eighty".