68113440 has 96 divisors (see below), whose sum is σ = 238412160. Its totient is φ = 18162432.

The previous prime is 68113439. The next prime is 68113471. The reversal of 68113440 is 4431186.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3564 + ... + 12203.

It is an arithmetic number, because the mean of its divisors is an integer number (2483460).

Almost surely, 2^68113440 is an apocalyptic number.

68113440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68113440 is an abundant number, since it is smaller than the sum of its proper divisors (170298720).

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

68113440 is a wasteful number, since it uses less digits than its factorization.

68113440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15791 (or 15777 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 68113440 is about 8253.0866952916. The cubic root of 68113440 is about 408.3923561310.

The spelling of 68113440 in words is "sixty-eight million, one hundred thirteen thousand, four hundred forty".