623724 has 12 divisors (see below), whose sum is σ = 1455384. Its totient is φ = 207904.

The previous prime is 623723. The next prime is 623729. The reversal of 623724 is 427326.

It is a tau number, because it is divible by the number of its divisors (12).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 623694 and 623703.

It is not an unprimeable number, because it can be changed into a prime (623723) 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, 25977 + ... + 26000.

It is an arithmetic number, because the mean of its divisors is an integer number (121282).

2⁶²³⁷²⁴ is an apocalyptic number.

It is an amenable number.

623724 is an abundant number, since it is smaller than the sum of its proper divisors (831660).

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

623724 is a wasteful number, since it uses less digits than its factorization.

623724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51984 (or 51982 counting only the distinct ones).

The product of its digits is 2016, while the sum is 24.

The square root of 623724 is about 789.7619894626. The cubic root of 623724 is about 85.4405729106.

The spelling of 623724 in words is "six hundred twenty-three thousand, seven hundred twenty-four".