1387801616 has 20 divisors (see below), whose sum is σ = 2690428992. Its totient is φ = 693497376.

The previous prime is 1387801603. The next prime is 1387801621. The reversal of 1387801616 is 6161087831.

It is a super-2 number, since 2×1387801616² = 3851986650744422912, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4205 + ... + 52851.

Almost surely, 2^1387801616 is an apocalyptic number.

1387801616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1387801616 is a deficient number, since it is larger than the sum of its proper divisors (1302627376).

1387801616 is a wasteful number, since it uses less digits than its factorization.

1387801616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50438 (or 50432 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 1387801616 is about 37253.2094724736. The cubic root of 1387801616 is about 1115.4303649459.

The spelling of 1387801616 in words is "one billion, three hundred eighty-seven million, eight hundred one thousand, six hundred sixteen".