65278072 has 64 divisors (see below), whose sum is σ = 136080000. Its totient is φ = 29232000.

The previous prime is 65278067. The next prime is 65278093. The reversal of 65278072 is 27087256.

It is a super-2 number, since 2×65278072² = 8522453368074368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 259947 + ... + 260197.

It is an arithmetic number, because the mean of its divisors is an integer number (2126250).

Almost surely, 2^65278072 is an apocalyptic number.

It is an amenable number.

65278072 is an abundant number, since it is smaller than the sum of its proper divisors (70801928).

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

65278072 is a wasteful number, since it uses less digits than its factorization.

65278072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364 (or 360 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 65278072 is about 8079.4846370298. The cubic root of 65278072 is about 402.6451197969.

The spelling of 65278072 in words is "sixty-five million, two hundred seventy-eight thousand, seventy-two".