1375771992 has 32 divisors (see below), whose sum is σ = 3930777600. Its totient is φ = 393077664.

The previous prime is 1375771967. The next prime is 1375772009. The reversal of 1375771992 is 2991775731.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 4094392 + ... + 4094727.

It is an arithmetic number, because the mean of its divisors is an integer number (122836800).

Almost surely, 2^1375771992 is an apocalyptic number.

1375771992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1375771992 is an abundant number, since it is smaller than the sum of its proper divisors (2555005608).

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

1375771992 is a wasteful number, since it uses less digits than its factorization.

1375771992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8189135 (or 8189131 counting only the distinct ones).

The product of its digits is 833490, while the sum is 51.

The square root of 1375771992 is about 37091.4005127873. The cubic root of 1375771992 is about 1112.1981148146.

The spelling of 1375771992 in words is "one billion, three hundred seventy-five million, seven hundred seventy-one thousand, nine hundred ninety-two".