28631722 has 32 divisors (see below), whose sum is σ = 50688000. Its totient is φ = 11875248.

The previous prime is 28631719. The next prime is 28631731. The reversal of 28631722 is 22713682.

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 15 ways as a sum of consecutive naturals, for example, 119679 + ... + 119917.

It is an arithmetic number, because the mean of its divisors is an integer number (1584000).

Almost surely, 2^28631722 is an apocalyptic number.

28631722 is a deficient number, since it is larger than the sum of its proper divisors (22056278).

28631722 is a wasteful number, since it uses less digits than its factorization.

28631722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490.

The product of its digits is 8064, while the sum is 31.

The square root of 28631722 is about 5350.8617997478. The cubic root of 28631722 is about 305.9256016887.

The spelling of 28631722 in words is "twenty-eight million, six hundred thirty-one thousand, seven hundred twenty-two".