774868728 has 32 divisors (see below), whose sum is σ = 1938096000. Its totient is φ = 258166368.

The previous prime is 774868727. The next prime is 774868733. The reversal of 774868728 is 827868477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (774868727) 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, 53623 + ... + 66521.

It is an arithmetic number, because the mean of its divisors is an integer number (60565500).

Almost surely, 2^774868728 is an apocalyptic number.

It is an amenable number.

774868728 is an abundant number, since it is smaller than the sum of its proper divisors (1163227272).

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

774868728 is a wasteful number, since it uses less digits than its factorization.

774868728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15411 (or 15407 counting only the distinct ones).

The product of its digits is 8429568, while the sum is 57.

The square root of 774868728 is about 27836.4639995816. The cubic root of 774868728 is about 918.4934100247.

The spelling of 774868728 in words is "seven hundred seventy-four million, eight hundred sixty-eight thousand, seven hundred twenty-eight".