1387865115 has 96 divisors (see below), whose sum is σ = 3024193536. Its totient is φ = 573108480.

The previous prime is 1387865081. The next prime is 1387865117. The reversal of 1387865115 is 5115687831.

It is not a de Polignac number, because 1387865115 - 2⁷ = 1387864987 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1387865117) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 188860 + ... + 196070.

It is an arithmetic number, because the mean of its divisors is an integer number (31502016).

Almost surely, 2^1387865115 is an apocalyptic number.

1387865115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1387865115 is an abundant number, since it is smaller than the sum of its proper divisors (1636328421).

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

1387865115 is a wasteful number, since it uses less digits than its factorization.

1387865115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7289 (or 7286 counting only the distinct ones).

The product of its digits is 201600, while the sum is 45.

The square root of 1387865115 is about 37254.0617248643. The cubic root of 1387865115 is about 1115.4473768953.

The spelling of 1387865115 in words is "one billion, three hundred eighty-seven million, eight hundred sixty-five thousand, one hundred fifteen".