647413872 has 80 divisors (see below), whose sum is σ = 1950470400. Its totient is φ = 184970688.

The previous prime is 647413853. The next prime is 647413883. The reversal of 647413872 is 278314746.

It is a Harshad number since it is a multiple of its sum of digits (42).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3198 + ... + 36125.

It is an arithmetic number, because the mean of its divisors is an integer number (24380880).

Almost surely, 2^647413872 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 647413872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (975235200).

647413872 is an abundant number, since it is smaller than the sum of its proper divisors (1303056528).

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

647413872 is a wasteful number, since it uses less digits than its factorization.

647413872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39355 (or 39335 counting only the distinct ones).

The product of its digits is 225792, while the sum is 42.

The square root of 647413872 is about 25444.3288769816. The cubic root of 647413872 is about 865.0887551905.

The spelling of 647413872 in words is "six hundred forty-seven million, four hundred thirteen thousand, eight hundred seventy-two".