64717428 has 24 divisors (see below), whose sum is σ = 151213888. Its totient is φ = 21542976.

The previous prime is 64717421. The next prime is 64717447. The reversal of 64717428 is 82471746.

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 not an unprimeable number, because it can be changed into a prime (64717421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6600 + ... + 13152.

Almost surely, 2^64717428 is an apocalyptic number.

It is an amenable number.

64717428 is an abundant number, since it is smaller than the sum of its proper divisors (86496460).

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

64717428 is a wasteful number, since it uses less digits than its factorization.

64717428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7383 (or 7381 counting only the distinct ones).

The product of its digits is 75264, while the sum is 39.

The square root of 64717428 is about 8044.7142895195. The cubic root of 64717428 is about 401.4890913054.

The spelling of 64717428 in words is "sixty-four million, seven hundred seventeen thousand, four hundred twenty-eight".