68791860 has 72 divisors (see below), whose sum is σ = 220953096. Its totient is φ = 17264640.

The previous prime is 68791847. The next prime is 68791861. The reversal of 68791860 is 6819786.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2108304 + 66683556 = 1452^2 + 8166^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68791861) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8181 + ... + 14300.

It is an arithmetic number, because the mean of its divisors is an integer number (3068793).

Almost surely, 2^68791860 is an apocalyptic number.

68791860 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68791860 is an abundant number, since it is smaller than the sum of its proper divisors (152161236).

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

68791860 is a wasteful number, since it uses less digits than its factorization.

68791860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22513 (or 22508 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 68791860 is about 8294.0858447450. The cubic root of 68791860 is about 409.7437621608.

The spelling of 68791860 in words is "sixty-eight million, seven hundred ninety-one thousand, eight hundred sixty".