649004520 has 64 divisors (see below), whose sum is σ = 1950480000. Its totient is φ = 172759808.

The previous prime is 649004509. The next prime is 649004537. The reversal of 649004520 is 25400946.

649004520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 67366 + ... + 76394.

It is an arithmetic number, because the mean of its divisors is an integer number (30476250).

Almost surely, 2^649004520 is an apocalyptic number.

649004520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

649004520 is an abundant number, since it is smaller than the sum of its proper divisors (1301475480).

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

649004520 is a wasteful number, since it uses less digits than its factorization.

649004520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9642 (or 9638 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 649004520 is about 25475.5671183195. The cubic root of 649004520 is about 865.7966621112.

The spelling of 649004520 in words is "six hundred forty-nine million, four thousand, five hundred twenty".