647396118 has 32 divisors (see below), whose sum is σ = 1442125920. Its totient is φ = 215278560.

The previous prime is 647396093. The next prime is 647396119. The reversal of 647396118 is 811693746.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647396119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8496 + ... + 36972.

It is an arithmetic number, because the mean of its divisors is an integer number (45066435).

Almost surely, 2^647396118 is an apocalyptic number.

647396118 is an abundant number, since it is smaller than the sum of its proper divisors (794729802).

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

647396118 is a wasteful number, since it uses less digits than its factorization.

647396118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28909 (or 28903 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 647396118 is about 25443.9799952759. The cubic root of 647396118 is about 865.0808473555.

The spelling of 647396118 in words is "six hundred forty-seven million, three hundred ninety-six thousand, one hundred eighteen".