1623440144 has 10 divisors (see below), whose sum is σ = 3145415310. Its totient is φ = 811720064.

The previous prime is 1623440069. The next prime is 1623440173. The reversal of 1623440144 is 4410443261.

It can be written as a sum of positive squares in only one way, i.e., 1466890000 + 156550144 = 38300^2 + 12512^2 .

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 as a sum of consecutive naturals, namely, 50732489 + ... + 50732520.

It is an arithmetic number, because the mean of its divisors is an integer number (314541531).

Almost surely, 2^1623440144 is an apocalyptic number.

It is an amenable number.

1623440144 is a deficient number, since it is larger than the sum of its proper divisors (1521975166).

1623440144 is a wasteful number, since it uses less digits than its factorization.

1623440144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101465017 (or 101465011 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 1623440144 is about 40291.9364637641. The cubic root of 1623440144 is about 1175.2910446074.

The spelling of 1623440144 in words is "one billion, six hundred twenty-three million, four hundred forty thousand, one hundred forty-four".