1388233944 has 64 divisors (see below), whose sum is σ = 3989196000. Its totient is φ = 446785920.

The previous prime is 1388233933. The next prime is 1388234009. The reversal of 1388233944 is 4493328831.

1388233944 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1388233944.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104547 + ... + 117074.

Almost surely, 2^1388233944 is an apocalyptic number.

It is an amenable number.

1388233944 is an abundant number, since it is smaller than the sum of its proper divisors (2600962056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1388233944 is a wasteful number, since it uses less digits than its factorization.

1388233944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221665 (or 221655 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The square root of 1388233944 is about 37259.0115810927. The cubic root of 1388233944 is about 1115.5461792205.

The spelling of 1388233944 in words is "one billion, three hundred eighty-eight million, two hundred thirty-three thousand, nine hundred forty-four".