640482408 has 48 divisors (see below), whose sum is σ = 1745059680. Its totient is φ = 212211744.

The previous prime is 640482397. The next prime is 640482421. The reversal of 640482408 is 804284046.

640482408 is a `hidden beast` number, since 6 + 404 + 8 + 240 + 8 = 666.

640482408 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 (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14610 + ... + 38657.

It is an arithmetic number, because the mean of its divisors is an integer number (36355410).

Almost surely, 2^640482408 is an apocalyptic number.

It is an amenable number.

640482408 is an abundant number, since it is smaller than the sum of its proper divisors (1104577272).

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

640482408 is a wasteful number, since it uses less digits than its factorization.

640482408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53446 (or 53439 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 36.

The square root of 640482408 is about 25307.7539106101. The cubic root of 640482408 is about 861.9903459100.

The spelling of 640482408 in words is "six hundred forty million, four hundred eighty-two thousand, four hundred eight".