772542728 has 8 divisors (see below), whose sum is σ = 1448517630. Its totient is φ = 386271360.

The previous prime is 772542709. The next prime is 772542731. The reversal of 772542728 is 827245277.

It can be written as a sum of positive squares in only one way, i.e., 771617284 + 925444 = 27778^2 + 962^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48283913 + ... + 48283928.

Almost surely, 2^772542728 is an apocalyptic number.

It is an amenable number.

772542728 is a deficient number, since it is larger than the sum of its proper divisors (675974902).

772542728 is a wasteful number, since it uses less digits than its factorization.

772542728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96567847 (or 96567843 counting only the distinct ones).

The product of its digits is 439040, while the sum is 44.

The square root of 772542728 is about 27794.6528670534. The cubic root of 772542728 is about 917.5734447613.

The spelling of 772542728 in words is "seven hundred seventy-two million, five hundred forty-two thousand, seven hundred twenty-eight".