1238890724 has 12 divisors (see below), whose sum is σ = 2203601148. Its totient is φ = 609290400.

The previous prime is 1238890717. The next prime is 1238890733. The reversal of 1238890724 is 4270988321.

It can be written as a sum of positive squares in 2 ways, for example, as 60341824 + 1178548900 = 7768^2 + 34330^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2538467 + ... + 2538954.

It is an arithmetic number, because the mean of its divisors is an integer number (183633429).

Almost surely, 2^1238890724 is an apocalyptic number.

It is an amenable number.

1238890724 is a deficient number, since it is larger than the sum of its proper divisors (964710424).

1238890724 is a wasteful number, since it uses less digits than its factorization.

1238890724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5077486 (or 5077484 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 1238890724 is about 35197.8795384040. The cubic root of 1238890724 is about 1074.0166161846.

The spelling of 1238890724 in words is "one billion, two hundred thirty-eight million, eight hundred ninety thousand, seven hundred twenty-four".