640292352 has 320 divisors, whose sum is σ = 2149576704. Its totient is φ = 165150720.

The previous prime is 640292351. The next prime is 640292353. The reversal of 640292352 is 253292046.

It is an interprime number because it is at equal distance from previous prime (640292351) and next prime (640292353).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640292351) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5666248 + ... + 5666360.

Almost surely, 2^640292352 is an apocalyptic number.

640292352 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 640292352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1074788352).

640292352 is an abundant number, since it is smaller than the sum of its proper divisors (1509284352).

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

640292352 is a wasteful number, since it uses less digits than its factorization.

640292352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 640292352 is about 25303.9987353778. The cubic root of 640292352 is about 861.9050754730.

The spelling of 640292352 in words is "six hundred forty million, two hundred ninety-two thousand, three hundred fifty-two".