1640232624 has 40 divisors (see below), whose sum is σ = 4486520880. Its totient is φ = 514582528.

The previous prime is 1640232623. The next prime is 1640232631. The reversal of 1640232624 is 4262320461.

It is a junction number, because it is equal to n+sod(n) for n = 1640232591 and 1640232600.

It is not an unprimeable number, because it can be changed into a prime (1640232623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1004229 + ... + 1005860.

It is an arithmetic number, because the mean of its divisors is an integer number (112163022).

Almost surely, 2^1640232624 is an apocalyptic number.

It is an amenable number.

1640232624 is an abundant number, since it is smaller than the sum of its proper divisors (2846288256).

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

1640232624 is a wasteful number, since it uses less digits than its factorization.

1640232624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2010117 (or 2010111 counting only the distinct ones).

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

The square root of 1640232624 is about 40499.7854809134. The cubic root of 1640232624 is about 1179.3294629529.

The spelling of 1640232624 in words is "one billion, six hundred forty million, two hundred thirty-two thousand, six hundred twenty-four".