1640928936 has 32 divisors (see below), whose sum is σ = 4105107360. Its totient is φ = 546604992.

The previous prime is 1640928917. The next prime is 1640928973. The reversal of 1640928936 is 6398290461.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

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, 14106 + ... + 58998.

It is an arithmetic number, because the mean of its divisors is an integer number (128284605).

Almost surely, 2^1640928936 is an apocalyptic number.

It is an amenable number.

1640928936 is an abundant number, since it is smaller than the sum of its proper divisors (2464178424).

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

1640928936 is a wasteful number, since it uses less digits than its factorization.

1640928936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46425 (or 46421 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 48.

The square root of 1640928936 is about 40508.3810587389. The cubic root of 1640928936 is about 1179.4963224316.

The spelling of 1640928936 in words is "one billion, six hundred forty million, nine hundred twenty-eight thousand, nine hundred thirty-six".