1377939808 has 96 divisors (see below), whose sum is σ = 3231083520. Its totient is φ = 566154240.

The previous prime is 1377939799. The next prime is 1377939809. The reversal of 1377939808 is 8089397731.

It is a super-2 number, since 2×1377939808² = 3797436228942153728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1377939809) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 540585 + ... + 543127.

It is an arithmetic number, because the mean of its divisors is an integer number (33657120).

Almost surely, 2^1377939808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1377939808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1615541760).

1377939808 is an abundant number, since it is smaller than the sum of its proper divisors (1853143712).

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

1377939808 is a wasteful number, since it uses less digits than its factorization.

1377939808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2660 (or 2652 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 55.

The square root of 1377939808 is about 37120.6116328920. The cubic root of 1377939808 is about 1112.7819750337.

The spelling of 1377939808 in words is "one billion, three hundred seventy-seven million, nine hundred thirty-nine thousand, eight hundred eight".