1377387108 has 72 divisors (see below), whose sum is σ = 3701775168. Its totient is φ = 430867008.

The previous prime is 1377387097. The next prime is 1377387127. The reversal of 1377387108 is 8017837731.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

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 23 ways as a sum of consecutive naturals, for example, 28191 + ... + 59577.

It is an arithmetic number, because the mean of its divisors is an integer number (51413544).

Almost surely, 2^1377387108 is an apocalyptic number.

1377387108 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1377387108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1850887584).

1377387108 is an abundant number, since it is smaller than the sum of its proper divisors (2324388060).

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

1377387108 is a wasteful number, since it uses less digits than its factorization.

1377387108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31473 (or 31468 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 45.

The square root of 1377387108 is about 37113.1662351786. The cubic root of 1377387108 is about 1112.6331739410.

The spelling of 1377387108 in words is "one billion, three hundred seventy-seven million, three hundred eighty-seven thousand, one hundred eight".