640392482 has 16 divisors (see below), whose sum is σ = 1049905152. Its totient is φ = 291639360.

The previous prime is 640392461. The next prime is 640392497. The reversal of 640392482 is 284293046.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302738 + ... + 304845.

It is an arithmetic number, because the mean of its divisors is an integer number (65619072).

Almost surely, 2^640392482 is an apocalyptic number.

640392482 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

640392482 is a deficient number, since it is larger than the sum of its proper divisors (409512670).

640392482 is a wasteful number, since it uses less digits than its factorization.

640392482 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607633.

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 640392482 is about 25305.9771990729. The cubic root of 640392482 is about 861.9500018553.

The spelling of 640392482 in words is "six hundred forty million, three hundred ninety-two thousand, four hundred eighty-two".