1091472660 has 72 divisors (see below), whose sum is σ = 3343636296. Its totient is φ = 288172800.

The previous prime is 1091472643. The next prime is 1091472737. The reversal of 1091472660 is 662741901.

It can be written as a sum of positive squares in 4 ways, for example, as 545596164 + 545876496 = 23358^2 + 23364^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11839 + ... + 48198.

It is an arithmetic number, because the mean of its divisors is an integer number (46439393).

Almost surely, 2^1091472660 is an apocalyptic number.

1091472660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1091472660 is an abundant number, since it is smaller than the sum of its proper divisors (2252163636).

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

1091472660 is a wasteful number, since it uses less digits than its factorization.

1091472660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60153 (or 60148 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 1091472660 is about 33037.4433030160. The cubic root of 1091472660 is about 1029.6057371860.

The spelling of 1091472660 in words is "one billion, ninety-one million, four hundred seventy-two thousand, six hundred sixty".