1238924642 has 6 divisors (see below), whose sum is σ = 1858461633. Its totient is φ = 619437432.

The previous prime is 1238924639. The next prime is 1238924677. The reversal of 1238924642 is 2464298321.

It can be written as a sum of positive squares in 2 ways, for example, as 697012801 + 541911841 = 26401^2 + 23279^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=24889.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1238924642.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 37334 + ... + 62222.

Almost surely, 2^1238924642 is an apocalyptic number.

1238924642 is a deficient number, since it is larger than the sum of its proper divisors (619536991).

1238924642 is an frugal number, since it uses more digits than its factorization.

1238924642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49780 (or 24891 counting only the distinct ones).

The product of its digits is 165888, while the sum is 41.

The square root of 1238924642 is about 35198.3613539040. The cubic root of 1238924642 is about 1074.0264174696.

Multiplying 1238924642 by its product of digits (165888), we get a square (205522731012096 = 14336064²).

The spelling of 1238924642 in words is "one billion, two hundred thirty-eight million, nine hundred twenty-four thousand, six hundred forty-two".