1636982940 has 48 divisors (see below), whose sum is σ = 4585398048. Its totient is φ = 436353024.

The previous prime is 1636982929. The next prime is 1636982947. The reversal of 1636982940 is 492896361.

It is a self number, because there is not a number n which added to its sum of digits gives 1636982940.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1636982947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223984 + ... + 231176.

It is an arithmetic number, because the mean of its divisors is an integer number (95529126).

Almost surely, 2^1636982940 is an apocalyptic number.

1636982940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1636982940 is an abundant number, since it is smaller than the sum of its proper divisors (2948415108).

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

1636982940 is a wasteful number, since it uses less digits than its factorization.

1636982940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10998 (or 10996 counting only the distinct ones).

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

The square root of 1636982940 is about 40459.6458214849. The cubic root of 1636982940 is about 1178.5501056407.

The spelling of 1636982940 in words is "one billion, six hundred thirty-six million, nine hundred eighty-two thousand, nine hundred forty".