647417028 has 12 divisors (see below), whose sum is σ = 1510639760. Its totient is φ = 215805672.

The previous prime is 647417027. The next prime is 647417063. The reversal of 647417028 is 820714746.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (647417027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26975698 + ... + 26975721.

Almost surely, 2^647417028 is an apocalyptic number.

It is an amenable number.

647417028 is an abundant number, since it is smaller than the sum of its proper divisors (863222732).

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

647417028 is a wasteful number, since it uses less digits than its factorization.

647417028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53951426 (or 53951424 counting only the distinct ones).

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

The square root of 647417028 is about 25444.3908946550. The cubic root of 647417028 is about 865.0901608939.

The spelling of 647417028 in words is "six hundred forty-seven million, four hundred seventeen thousand, twenty-eight".