1913913140 has 24 divisors (see below), whose sum is σ = 4021208520. Its totient is φ = 765186048.

The previous prime is 1913913139. The next prime is 1913913151. The reversal of 1913913140 is 413193191.

It can be written as a sum of positive squares in 4 ways, for example, as 29311396 + 1884601744 = 5414^2 + 43412^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1913913097 and 1913913106.

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, 19616 + ... + 64904.

It is an arithmetic number, because the mean of its divisors is an integer number (167550355).

Almost surely, 2^1913913140 is an apocalyptic number.

1913913140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1913913140 is an abundant number, since it is smaller than the sum of its proper divisors (2107295380).

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

1913913140 is a wasteful number, since it uses less digits than its factorization.

1913913140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47411 (or 47409 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 1913913140 is about 43748.2929952701. The cubic root of 1913913140 is about 1241.5781891121.

The spelling of 1913913140 in words is "one billion, nine hundred thirteen million, nine hundred thirteen thousand, one hundred forty".