65212380 has 36 divisors (see below), whose sum is σ = 197811432. Its totient is φ = 17389920.

The previous prime is 65212379. The next prime is 65212397. The reversal of 65212380 is 8321256.

65212380 is a `hidden beast` number, since 652 + 1 + 2 + 3 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 180966 + ... + 181325.

It is an arithmetic number, because the mean of its divisors is an integer number (5494762).

Almost surely, 2^65212380 is an apocalyptic number.

65212380 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65212380 is an abundant number, since it is smaller than the sum of its proper divisors (132599052).

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

65212380 is a wasteful number, since it uses less digits than its factorization.

65212380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362306 (or 362301 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 65212380 is about 8075.4182554218. The cubic root of 65212380 is about 402.5100083671.

The spelling of 65212380 in words is "sixty-five million, two hundred twelve thousand, three hundred eighty".