647576380 has 48 divisors (see below), whose sum is σ = 1534710240. Its totient is φ = 227360000.

The previous prime is 647576353. The next prime is 647576383. The reversal of 647576380 is 83675746.

It is a self number, because there is not a number n which added to its sum of digits gives 647576380.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647576383) 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, 44371 + ... + 57130.

It is an arithmetic number, because the mean of its divisors is an integer number (31973130).

Almost surely, 2^647576380 is an apocalyptic number.

It is an amenable number.

647576380 is an abundant number, since it is smaller than the sum of its proper divisors (887133860).

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

647576380 is a wasteful number, since it uses less digits than its factorization.

647576380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101550 (or 101548 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 46.

The square root of 647576380 is about 25447.5220797625. The cubic root of 647576380 is about 865.1611313981.

The spelling of 647576380 in words is "six hundred forty-seven million, five hundred seventy-six thousand, three hundred eighty".