1387438752 has 96 divisors (see below), whose sum is σ = 4343334912. Its totient is φ = 379171584.

The previous prime is 1387438751. The next prime is 1387438757. The reversal of 1387438752 is 2578347831.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (1387438751) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29428 + ... + 60339.

It is an arithmetic number, because the mean of its divisors is an integer number (45243072).

Almost surely, 2^1387438752 is an apocalyptic number.

1387438752 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1387438752 is an abundant number, since it is smaller than the sum of its proper divisors (2955896160).

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

1387438752 is a wasteful number, since it uses less digits than its factorization.

1387438752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89810 (or 89802 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 48.

The square root of 1387438752 is about 37248.3389159839. The cubic root of 1387438752 is about 1115.3331404818. Note that the first 3 decimals are identical.

The spelling of 1387438752 in words is "one billion, three hundred eighty-seven million, four hundred thirty-eight thousand, seven hundred fifty-two".