1159193920 has 28 divisors (see below), whose sum is σ = 2760331284. Its totient is φ = 463677440.

The previous prime is 1159193879. The next prime is 1159193921. The reversal of 1159193920 is 293919511.

It can be written as a sum of positive squares in 2 ways, for example, as 131606784 + 1027587136 = 11472^2 + 32056^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1159193921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1810921 + ... + 1811560.

Almost surely, 2^1159193920 is an apocalyptic number.

1159193920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1159193920 is an abundant number, since it is smaller than the sum of its proper divisors (1601137364).

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

1159193920 is an equidigital number, since it uses as much as digits as its factorization.

1159193920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3622498 (or 3622488 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 40.

The square root of 1159193920 is about 34046.9370134818. The cubic root of 1159193920 is about 1050.4741380957.

The spelling of 1159193920 in words is "one billion, one hundred fifty-nine million, one hundred ninety-three thousand, nine hundred twenty".