68157902 has 16 divisors (see below), whose sum is σ = 111091200. Its totient is φ = 31243320.

The previous prime is 68157899. The next prime is 68157907. The reversal of 68157902 is 20975186.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68157907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27752 + ... + 30107.

It is an arithmetic number, because the mean of its divisors is an integer number (6943200).

Almost surely, 2^68157902 is an apocalyptic number.

68157902 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

68157902 is a deficient number, since it is larger than the sum of its proper divisors (42933298).

68157902 is a wasteful number, since it uses less digits than its factorization.

68157902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57911.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 68157902 is about 8255.7799147022. The cubic root of 68157902 is about 408.4811980757.

The spelling of 68157902 in words is "sixty-eight million, one hundred fifty-seven thousand, nine hundred two".