1391192020 has 24 divisors (see below), whose sum is σ = 2965110624. Its totient is φ = 548170656.

The previous prime is 1391192003. The next prime is 1391192041. The reversal of 1391192020 is 202911931.

It is a self number, because there is not a number n which added to its sum of digits gives 1391192020.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 517762 + ... + 520441.

It is an arithmetic number, because the mean of its divisors is an integer number (123546276).

Almost surely, 2^1391192020 is an apocalyptic number.

1391192020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1391192020 is an abundant number, since it is smaller than the sum of its proper divisors (1573918604).

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

1391192020 is a wasteful number, since it uses less digits than its factorization.

1391192020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038279 (or 1038277 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 1391192020 is about 37298.6865720497. The cubic root of 1391192020 is about 1116.3379596346.

The spelling of 1391192020 in words is "one billion, three hundred ninety-one million, one hundred ninety-two thousand, twenty".