65212880 has 40 divisors (see below), whose sum is σ = 156853800. Its totient is φ = 25184768.

The previous prime is 65212859. The next prime is 65212937. The reversal of 65212880 is 8821256.

It can be written as a sum of positive squares in 4 ways, for example, as 55696 + 65157184 = 236^2 + 8072^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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, 11735 + ... + 16374.

It is an arithmetic number, because the mean of its divisors is an integer number (3921345).

Almost surely, 2^65212880 is an apocalyptic number.

It is an amenable number.

65212880 is an abundant number, since it is smaller than the sum of its proper divisors (91640920).

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

65212880 is a wasteful number, since it uses less digits than its factorization.

65212880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28151 (or 28145 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 65212880 is about 8075.4492135113. The cubic root of 65212880 is about 402.5110370802.

The spelling of 65212880 in words is "sixty-five million, two hundred twelve thousand, eight hundred eighty".