1387888325 has 6 divisors (see below), whose sum is σ = 1720981554. Its totient is φ = 1110310640.

The previous prime is 1387888301. The next prime is 1387888343. The reversal of 1387888325 is 5238887831.

It can be written as a sum of positive squares in 3 ways, for example, as 228553924 + 1159334401 = 15118^2 + 34049^2 .

It is not a de Polignac number, because 1387888325 - 2¹⁰ = 1387887301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27757742 + ... + 27757791.

It is an arithmetic number, because the mean of its divisors is an integer number (286830259).

Almost surely, 2^1387888325 is an apocalyptic number.

It is an amenable number.

1387888325 is a deficient number, since it is larger than the sum of its proper divisors (333093229).

1387888325 is an equidigital number, since it uses as much as digits as its factorization.

1387888325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55515543 (or 55515538 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 53.

The square root of 1387888325 is about 37254.3732332192. The cubic root of 1387888325 is about 1115.4535949321.

The spelling of 1387888325 in words is "one billion, three hundred eighty-seven million, eight hundred eighty-eight thousand, three hundred twenty-five".