64278228 has 48 divisors (see below), whose sum is σ = 172214784. Its totient is φ = 18278880.

The previous prime is 64278211. The next prime is 64278233. The reversal of 64278228 is 82287246.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17383 + ... + 20753.

It is an arithmetic number, because the mean of its divisors is an integer number (3587808).

Almost surely, 2^64278228 is an apocalyptic number.

It is an amenable number.

64278228 is an abundant number, since it is smaller than the sum of its proper divisors (107936556).

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

64278228 is a wasteful number, since it uses less digits than its factorization.

64278228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3612 (or 3610 counting only the distinct ones).

The product of its digits is 86016, while the sum is 39.

The square root of 64278228 is about 8017.3703918430. The cubic root of 64278228 is about 400.5788037283.

The spelling of 64278228 in words is "sixty-four million, two hundred seventy-eight thousand, two hundred twenty-eight".