731679428 has 6 divisors (see below), whose sum is σ = 1280439006. Its totient is φ = 365839712.

The previous prime is 731679401. The next prime is 731679433. The reversal of 731679428 is 824976137.

It can be written as a sum of positive squares in only one way, i.e., 480837184 + 250842244 = 21928^2 + 15838^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 91459925 + ... + 91459932.

It is an arithmetic number, because the mean of its divisors is an integer number (213406501).

Almost surely, 2^731679428 is an apocalyptic number.

It is an amenable number.

731679428 is a deficient number, since it is larger than the sum of its proper divisors (548759578).

731679428 is a wasteful number, since it uses less digits than its factorization.

731679428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182919861 (or 182919859 counting only the distinct ones).

The product of its digits is 508032, while the sum is 47.

The square root of 731679428 is about 27049.5735271372. The cubic root of 731679428 is about 901.1012971008.

The spelling of 731679428 in words is "seven hundred thirty-one million, six hundred seventy-nine thousand, four hundred twenty-eight".