647269470 has 48 divisors (see below), whose sum is σ = 1696181760. Its totient is φ = 171243072.

The previous prime is 647269451. The next prime is 647269487. The reversal of 647269470 is 74962746.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16885 + ... + 39744.

It is an arithmetic number, because the mean of its divisors is an integer number (35337120).

Almost surely, 2^647269470 is an apocalyptic number.

647269470 is an abundant number, since it is smaller than the sum of its proper divisors (1048912290).

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

647269470 is a wasteful number, since it uses less digits than its factorization.

647269470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56769 (or 56766 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The square root of 647269470 is about 25441.4911119612. The cubic root of 647269470 is about 865.0244326911.

The spelling of 647269470 in words is "six hundred forty-seven million, two hundred sixty-nine thousand, four hundred seventy".