1387025618 has 16 divisors (see below), whose sum is σ = 2270271456. Its totient is φ = 630301440.

The previous prime is 1387025617. The next prime is 1387025621. The reversal of 1387025618 is 8165207831.

It is not an unprimeable number, because it can be changed into a prime (1387025617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127730 + ... + 138162.

It is an arithmetic number, because the mean of its divisors is an integer number (141891966).

Almost surely, 2^1387025618 is an apocalyptic number.

1387025618 is a deficient number, since it is larger than the sum of its proper divisors (883245838).

1387025618 is a wasteful number, since it uses less digits than its factorization.

1387025618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16489.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 1387025618 is about 37242.7928329764. The cubic root of 1387025618 is about 1115.2224262169. Note that the first 3 decimals are identical.

The spelling of 1387025618 in words is "one billion, three hundred eighty-seven million, twenty-five thousand, six hundred eighteen".