623984 has 20 divisors (see below), whose sum is σ = 1231320. Its totient is φ = 306240.

The previous prime is 623983. The next prime is 623989. The reversal of 623984 is 489326.

It is a self number, because there is not a number n which added to its sum of digits gives 623984.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 614 + ... + 1274.

It is an arithmetic number, because the mean of its divisors is an integer number (61566).

2⁶²³⁹⁸⁴ is an apocalyptic number.

It is an amenable number.

623984 is a deficient number, since it is larger than the sum of its proper divisors (607336).

623984 is a wasteful number, since it uses less digits than its factorization.

623984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728 (or 722 counting only the distinct ones).

The product of its digits is 10368, while the sum is 32.

The square root of 623984 is about 789.9265788667. The cubic root of 623984 is about 85.4524432587.

The spelling of 623984 in words is "six hundred twenty-three thousand, nine hundred eighty-four".