623631442 has 16 divisors (see below), whose sum is σ = 1069410240. Its totient is φ = 267188688.

The previous prime is 623631439. The next prime is 623631461. The reversal of 623631442 is 244136326.

623631442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71284 + ... + 79552.

It is an arithmetic number, because the mean of its divisors is an integer number (66838140).

Almost surely, 2^623631442 is an apocalyptic number.

623631442 is a deficient number, since it is larger than the sum of its proper divisors (445778798).

623631442 is a wasteful number, since it uses less digits than its factorization.

623631442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13665.

The product of its digits is 20736, while the sum is 31.

The square root of 623631442 is about 24972.6138399648. The cubic root of 623631442 is about 854.3634636184.

Adding to 623631442 its reverse (244136326), we get a palindrome (867767768).

The spelling of 623631442 in words is "six hundred twenty-three million, six hundred thirty-one thousand, four hundred forty-two".