68157402 has 16 divisors (see below), whose sum is σ = 136525440. Its totient is φ = 22684032.

The previous prime is 68157391. The next prime is 68157407. The reversal of 68157402 is 20475186.

It is not an unprimeable number, because it can be changed into a prime (68157407) 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, 4402 + ... + 12477.

It is an arithmetic number, because the mean of its divisors is an integer number (8532840).

Almost surely, 2^68157402 is an apocalyptic number.

68157402 is an abundant number, since it is smaller than the sum of its proper divisors (68368038).

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

68157402 is a wasteful number, since it uses less digits than its factorization.

68157402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17557.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 68157402 is about 8255.7496328317. The cubic root of 68157402 is about 408.4801992133.

The spelling of 68157402 in words is "sixty-eight million, one hundred fifty-seven thousand, four hundred two".