1642640232 has 32 divisors (see below), whose sum is σ = 4348166400. Its totient is φ = 515337984.

The previous prime is 1642640227. The next prime is 1642640257. The reversal of 1642640232 is 2320462461.

It is a self number, because there is not a number n which added to its sum of digits gives 1642640232.

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, 2012632 + ... + 2013447.

It is an arithmetic number, because the mean of its divisors is an integer number (135880200).

Almost surely, 2^1642640232 is an apocalyptic number.

1642640232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1642640232 is an abundant number, since it is smaller than the sum of its proper divisors (2705526168).

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

1642640232 is a wasteful number, since it uses less digits than its factorization.

1642640232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4026105 (or 4026101 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 1642640232 is about 40529.4982944522. The cubic root of 1642640232 is about 1179.9062053188.

The spelling of 1642640232 in words is "one billion, six hundred forty-two million, six hundred forty thousand, two hundred thirty-two".