68957730 has 40 divisors (see below), whose sum is σ = 185421852. Its totient is φ = 18388512.

The previous prime is 68957711. The next prime is 68957731. The reversal of 68957730 is 3775986.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 64016001 + 4941729 = 8001^2 + 2223^2 .

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

It is not an unprimeable number, because it can be changed into a prime (68957731) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 41757 + ... + 43376.

Almost surely, 2^68957730 is an apocalyptic number.

68957730 is an abundant number, since it is smaller than the sum of its proper divisors (116464122).

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

68957730 is a wasteful number, since it uses less digits than its factorization.

68957730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85152 (or 85143 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 68957730 is about 8304.0791181202. The cubic root of 68957730 is about 410.0728206962.

The spelling of 68957730 in words is "sixty-eight million, nine hundred fifty-seven thousand, seven hundred thirty".