1377947844 has 144 divisors (see below), whose sum is σ = 4391936640. Its totient is φ = 354516480.

The previous prime is 1377947797. The next prime is 1377947863. The reversal of 1377947844 is 4487497731.

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 47 ways as a sum of consecutive naturals, for example, 129187 + ... + 139445.

It is an arithmetic number, because the mean of its divisors is an integer number (30499560).

Almost surely, 2^1377947844 is an apocalyptic number.

1377947844 is a gapful number since it is divisible by the number (14) 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 1377947844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2195968320).

1377947844 is an abundant number, since it is smaller than the sum of its proper divisors (3013988796).

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

1377947844 is a wasteful number, since it uses less digits than its factorization.

1377947844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10330 (or 10325 counting only the distinct ones).

The product of its digits is 4741632, while the sum is 54.

The square root of 1377947844 is about 37120.7198744852. The cubic root of 1377947844 is about 1112.7841382386.

The spelling of 1377947844 in words is "one billion, three hundred seventy-seven million, nine hundred forty-seven thousand, eight hundred forty-four".