1164381780 has 24 divisors (see below), whose sum is σ = 3260269152. Its totient is φ = 310501792.

The previous prime is 1164381773. The next prime is 1164381797. The reversal of 1164381780 is 871834611.

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, 9703122 + ... + 9703241.

It is an arithmetic number, because the mean of its divisors is an integer number (135844548).

Almost surely, 2^1164381780 is an apocalyptic number.

1164381780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1164381780 is an abundant number, since it is smaller than the sum of its proper divisors (2095887372).

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

1164381780 is a wasteful number, since it uses less digits than its factorization.

1164381780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19406375 (or 19406373 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 1164381780 is about 34123.0388447453. The cubic root of 1164381780 is about 1052.0389044777.

The spelling of 1164381780 in words is "one billion, one hundred sixty-four million, three hundred eighty-one thousand, seven hundred eighty".