1164491620 has 96 divisors (see below), whose sum is σ = 2567829600. Its totient is φ = 443289600.

The previous prime is 1164491611. The next prime is 1164491651. The reversal of 1164491620 is 261944611.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 65966884 + 1098524736 = 8122^2 + 33144^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7815306 + ... + 7815454.

It is an arithmetic number, because the mean of its divisors is an integer number (26748225).

Almost surely, 2^1164491620 is an apocalyptic number.

1164491620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1164491620 is an abundant number, since it is smaller than the sum of its proper divisors (1403337980).

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

1164491620 is a wasteful number, since it uses less digits than its factorization.

1164491620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385 (or 383 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 1164491620 is about 34124.6482765757. The cubic root of 1164491620 is about 1052.0719842120.

The spelling of 1164491620 in words is "one billion, one hundred sixty-four million, four hundred ninety-one thousand, six hundred twenty".