623156642 has 8 divisors (see below), whose sum is σ = 983931600. Its totient is φ = 295179444.

The previous prime is 623156593. The next prime is 623156657. The reversal of 623156642 is 246651326.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8199392 + ... + 8199467.

It is an arithmetic number, because the mean of its divisors is an integer number (122991450).

Almost surely, 2^623156642 is an apocalyptic number.

623156642 is a deficient number, since it is larger than the sum of its proper divisors (360774958).

623156642 is a wasteful number, since it uses less digits than its factorization.

623156642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16398880.

The product of its digits is 51840, while the sum is 35.

The square root of 623156642 is about 24963.1056160887. The cubic root of 623156642 is about 854.1465861830.

The spelling of 623156642 in words is "six hundred twenty-three million, one hundred fifty-six thousand, six hundred forty-two".