1391103992 has 32 divisors (see below), whose sum is σ = 2644293600. Its totient is φ = 686014464.

The previous prime is 1391103983. The next prime is 1391104003. The reversal of 1391103992 is 2993011931.

It is a super-4 number, since 4×1391103992⁴ (a number of 38 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208484 + ... + 215052.

It is an arithmetic number, because the mean of its divisors is an integer number (82634175).

Almost surely, 2^1391103992 is an apocalyptic number.

It is an amenable number.

1391103992 is a deficient number, since it is larger than the sum of its proper divisors (1253189608).

1391103992 is a wasteful number, since it uses less digits than its factorization.

1391103992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6935 (or 6931 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 38.

The square root of 1391103992 is about 37297.5065118300. The cubic root of 1391103992 is about 1116.3144136229.

The spelling of 1391103992 in words is "one billion, three hundred ninety-one million, one hundred three thousand, nine hundred ninety-two".