647274478 has 8 divisors (see below), whose sum is σ = 989230968. Its totient is φ = 317530824.

The previous prime is 647274469. The next prime is 647274479. The reversal of 647274478 is 874472746.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647274479) 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, 3053076 + ... + 3053287.

It is an arithmetic number, because the mean of its divisors is an integer number (123653871).

Almost surely, 2^647274478 is an apocalyptic number.

647274478 is a deficient number, since it is larger than the sum of its proper divisors (341956490).

647274478 is a wasteful number, since it uses less digits than its factorization.

647274478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6106418.

The product of its digits is 2107392, while the sum is 49.

The square root of 647274478 is about 25441.5895336750. The cubic root of 647274478 is about 865.0266636173.

The spelling of 647274478 in words is "six hundred forty-seven million, two hundred seventy-four thousand, four hundred seventy-eight".