1913152320 has 84 divisors (see below), whose sum is σ = 6580456740. Its totient is φ = 510173184.

The previous prime is 1913152271. The next prime is 1913152331. The reversal of 1913152320 is 232513191.

1913152320 is a `hidden beast` number, since 1 + 9 + 131 + 523 + 2 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1515389184 + 397763136 = 38928^2 + 19944^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 329265 + ... + 335024.

Almost surely, 2^1913152320 is an apocalyptic number.

1913152320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1913152320 is an abundant number, since it is smaller than the sum of its proper divisors (4667304420).

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

1913152320 is a wasteful number, since it uses less digits than its factorization.

1913152320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664312 (or 664299 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 1913152320 is about 43739.5967059597. The cubic root of 1913152320 is about 1241.4136496503.

The spelling of 1913152320 in words is "one billion, nine hundred thirteen million, one hundred fifty-two thousand, three hundred twenty".