623872 has 18 divisors (see below), whose sum is σ = 1245818. Its totient is φ = 311808.

The previous prime is 623869. The next prime is 623879. The reversal of 623872 is 278326.

It can be written as a sum of positive squares in only one way, i.e., 614656 + 9216 = 784^2 + 96^2 .

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 623872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 963 + ... + 1474.

2⁶²³⁸⁷² is an apocalyptic number.

It is an amenable number.

623872 is a deficient number, since it is larger than the sum of its proper divisors (621946).

623872 is an equidigital number, since it uses as much as digits as its factorization.

623872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2453 (or 2439 counting only the distinct ones).

The product of its digits is 4032, while the sum is 28.

The square root of 623872 is about 789.8556830206. The cubic root of 623872 is about 85.4473302824.

The spelling of 623872 in words is "six hundred twenty-three thousand, eight hundred seventy-two".