647134488 has 512 divisors, whose sum is σ = 2506291200. Its totient is φ = 149299200.

The previous prime is 647134487. The next prime is 647134489. The reversal of 647134488 is 884431746.

It is an interprime number because it is at equal distance from previous prime (647134487) and next prime (647134489).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647134487) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 8864820 + ... + 8864892.

It is an arithmetic number, because the mean of its divisors is an integer number (4895100).

Almost surely, 2^647134488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647134488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1253145600).

647134488 is an abundant number, since it is smaller than the sum of its proper divisors (1859156712).

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

647134488 is a wasteful number, since it uses less digits than its factorization.

647134488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 150 counting only the distinct ones).

The product of its digits is 516096, while the sum is 45.

The square root of 647134488 is about 25438.8381810176. The cubic root of 647134488 is about 864.9642975898.

The spelling of 647134488 in words is "six hundred forty-seven million, one hundred thirty-four thousand, four hundred eighty-eight".