212377720 has 16 divisors (see below), whose sum is σ = 477849960. Its totient is φ = 84951072.

The previous prime is 212377691. The next prime is 212377721. The reversal of 212377720 is 27773212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212377721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2654682 + ... + 2654761.

Almost surely, 2^212377720 is an apocalyptic number.

212377720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212377720 is an abundant number, since it is smaller than the sum of its proper divisors (265472240).

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

212377720 is a wasteful number, since it uses less digits than its factorization.

212377720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5309454 (or 5309450 counting only the distinct ones).

The product of its (nonzero) digits is 8232, while the sum is 31.

The square root of 212377720 is about 14573.1849641731. The cubic root of 212377720 is about 596.6271119429.

The spelling of 212377720 in words is "two hundred twelve million, three hundred seventy-seven thousand, seven hundred twenty".