920687728 has 20 divisors (see below), whose sum is σ = 1784303208. Its totient is φ = 460222400.

The previous prime is 920687689. The next prime is 920687773. The reversal of 920687728 is 827786029.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112578 + ... + 120478.

Almost surely, 2^920687728 is an apocalyptic number.

It is an amenable number.

920687728 is a deficient number, since it is larger than the sum of its proper divisors (863615480).

920687728 is a wasteful number, since it uses less digits than its factorization.

920687728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15192 (or 15186 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 920687728 is about 30342.8365186909. The cubic root of 920687728 is about 972.8311124395.

The spelling of 920687728 in words is "nine hundred twenty million, six hundred eighty-seven thousand, seven hundred twenty-eight".