1377381798 has 48 divisors (see below), whose sum is σ = 3292301376. Its totient is φ = 413470080.

The previous prime is 1377381791. The next prime is 1377381799. The reversal of 1377381798 is 8971837731.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1377381791) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62190 + ... + 81377.

It is an arithmetic number, because the mean of its divisors is an integer number (68589612).

Almost surely, 2^1377381798 is an apocalyptic number.

1377381798 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1377381798 is an abundant number, since it is smaller than the sum of its proper divisors (1914919578).

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

1377381798 is a wasteful number, since it uses less digits than its factorization.

1377381798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143629 (or 143626 counting only the distinct ones).

The product of its digits is 1778112, while the sum is 54.

The square root of 1377381798 is about 37113.0946971551. The cubic root of 1377381798 is about 1112.6317441590.

The spelling of 1377381798 in words is "one billion, three hundred seventy-seven million, three hundred eighty-one thousand, seven hundred ninety-eight".