623980 has 24 divisors (see below), whose sum is σ = 1497888. Its totient is φ = 213888.

The previous prime is 623977. The next prime is 623983. The reversal of 623980 is 89326.

It is an interprime number because it is at equal distance from previous prime (623977) and next prime (623983).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (623983) 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, 2089 + ... + 2368.

It is an arithmetic number, because the mean of its divisors is an integer number (62412).

2⁶²³⁹⁸⁰ is an apocalyptic number.

It is an amenable number.

623980 is an abundant number, since it is smaller than the sum of its proper divisors (873908).

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

623980 is a wasteful number, since it uses less digits than its factorization.

623980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4473 (or 4471 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 623980 is about 789.9240469817. The cubic root of 623980 is about 85.4522606629.

The spelling of 623980 in words is "six hundred twenty-three thousand, nine hundred eighty".