649928574 has 48 divisors (see below), whose sum is σ = 1445558400. Its totient is φ = 210925008.

The previous prime is 649928567. The next prime is 649928621. The reversal of 649928574 is 475829946.

649928574 is a `hidden beast` number, since 6 + 49 + 9 + 28 + 574 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 649928574.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 276697 + ... + 279035.

It is an arithmetic number, because the mean of its divisors is an integer number (30115800).

Almost surely, 2^649928574 is an apocalyptic number.

649928574 is an abundant number, since it is smaller than the sum of its proper divisors (795629826).

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

649928574 is a wasteful number, since it uses less digits than its factorization.

649928574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2749 (or 2746 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The square root of 649928574 is about 25493.6967503734. The cubic root of 649928574 is about 866.2073749508.

The spelling of 649928574 in words is "six hundred forty-nine million, nine hundred twenty-eight thousand, five hundred seventy-four".