1387910718 has 12 divisors (see below), whose sum is σ = 3007139928. Its totient is φ = 462636900.

The previous prime is 1387910707. The next prime is 1387910731. The reversal of 1387910718 is 8170197831.

It is a happy number.

It is a super-2 number, since 2×1387910718² = 3852592322278551048, which contains 22 as substring.

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, 38553058 + ... + 38553093.

It is an arithmetic number, because the mean of its divisors is an integer number (250594994).

Almost surely, 2^1387910718 is an apocalyptic number.

1387910718 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1387910718 is an abundant number, since it is smaller than the sum of its proper divisors (1619229210).

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

1387910718 is a wasteful number, since it uses less digits than its factorization.

1387910718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77106159 (or 77106156 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 45.

The square root of 1387910718 is about 37254.6737739039. The cubic root of 1387910718 is about 1115.4595940262.

The spelling of 1387910718 in words is "one billion, three hundred eighty-seven million, nine hundred ten thousand, seven hundred eighteen".