68728764 has 24 divisors (see below), whose sum is σ = 172703440. Its totient is φ = 21147264.

The previous prime is 68728763. The next prime is 68728771. The reversal of 68728764 is 46782786.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68728763) 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, 220129 + ... + 220440.

Almost surely, 2^68728764 is an apocalyptic number.

It is an amenable number.

68728764 is an abundant number, since it is smaller than the sum of its proper divisors (103974676).

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

68728764 is a wasteful number, since it uses less digits than its factorization.

68728764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440589 (or 440587 counting only the distinct ones).

The product of its digits is 903168, while the sum is 48.

The square root of 68728764 is about 8290.2812980019. The cubic root of 68728764 is about 409.6184513045.

The spelling of 68728764 in words is "sixty-eight million, seven hundred twenty-eight thousand, seven hundred sixty-four".