1913158368 has 72 divisors (see below), whose sum is σ = 5935148856. Its totient is φ = 579744000.

The previous prime is 1913158349. The next prime is 1913158381. The reversal of 1913158368 is 8638513191.

It is a happy number.

1913158368 is a `hidden beast` number, since 1 + 9 + 1 + 3 + 1 + 583 + 68 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 298783 + ... + 305118.

It is an arithmetic number, because the mean of its divisors is an integer number (82432623).

Almost surely, 2^1913158368 is an apocalyptic number.

1913158368 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1913158368 is an abundant number, since it is smaller than the sum of its proper divisors (4021990488).

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

1913158368 is a wasteful number, since it uses less digits than its factorization.

1913158368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603928 (or 603917 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 1913158368 is about 43739.6658423450. The cubic root of 1913158368 is about 1241.4149577988.

The spelling of 1913158368 in words is "one billion, nine hundred thirteen million, one hundred fifty-eight thousand, three hundred sixty-eight".