1623968980 has 24 divisors (see below), whose sum is σ = 3411119880. Its totient is φ = 649438080.

The previous prime is 1623968977. The next prime is 1623968987. The reversal of 1623968980 is 898693261.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 73342096 + 1550626884 = 8564^2 + 39378^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1623968987) 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, 131470 + ... + 143290.

It is an arithmetic number, because the mean of its divisors is an integer number (142129995).

Almost surely, 2^1623968980 is an apocalyptic number.

1623968980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1623968980 is an abundant number, since it is smaller than the sum of its proper divisors (1787150900).

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

1623968980 is a wasteful number, since it uses less digits than its factorization.

1623968980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18699 (or 18697 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 52.

The square root of 1623968980 is about 40298.4984831941. The cubic root of 1623968980 is about 1175.4186478621.

The spelling of 1623968980 in words is "one billion, six hundred twenty-three million, nine hundred sixty-eight thousand, nine hundred eighty".