649074880 has 28 divisors (see below), whose sum is σ = 1545610320. Its totient is φ = 259629824.

The previous prime is 649074863. The next prime is 649074883. The reversal of 649074880 is 88470946.

It is a happy number.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 649074880.

It is not an unprimeable number, because it can be changed into a prime (649074883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1013860 + ... + 1014499.

Almost surely, 2^649074880 is an apocalyptic number.

It is an amenable number.

649074880 is an abundant number, since it is smaller than the sum of its proper divisors (896535440).

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

649074880 is a wasteful number, since it uses less digits than its factorization.

649074880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2028376 (or 2028366 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 649074880 is about 25476.9480118793. The cubic root of 649074880 is about 865.8279486174.

The spelling of 649074880 in words is "six hundred forty-nine million, seventy-four thousand, eight hundred eighty".