1388737248 has 48 divisors (see below), whose sum is σ = 3659055120. Its totient is φ = 461182976.

The previous prime is 1388737237. The next prime is 1388737261. The reversal of 1388737248 is 8427378831.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×1388737248² = 3857182287965227008, which contains 22 as substring.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1388737248.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1065 + ... + 52712.

It is an arithmetic number, because the mean of its divisors is an integer number (76230315).

Almost surely, 2^1388737248 is an apocalyptic number.

It is an amenable number.

1388737248 is an abundant number, since it is smaller than the sum of its proper divisors (2270317872).

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

1388737248 is a wasteful number, since it uses less digits than its factorization.

1388737248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54059 (or 54051 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 51.

The square root of 1388737248 is about 37265.7650934474. The cubic root of 1388737248 is about 1115.6809766294.

The spelling of 1388737248 in words is "one billion, three hundred eighty-eight million, seven hundred thirty-seven thousand, two hundred forty-eight".