28631738 has 8 divisors (see below), whose sum is σ = 42971040. Its totient is φ = 14308060.

The previous prime is 28631731. The next prime is 28631773. The reversal of 28631738 is 83713682.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (28631731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3443 + ... + 8313.

It is an arithmetic number, because the mean of its divisors is an integer number (5371380).

Almost surely, 2^28631738 is an apocalyptic number.

28631738 is a deficient number, since it is larger than the sum of its proper divisors (14339302).

28631738 is a wasteful number, since it uses less digits than its factorization.

28631738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7812.

The product of its digits is 48384, while the sum is 38.

The square root of 28631738 is about 5350.8632948338. The cubic root of 28631738 is about 305.9256586746.

The spelling of 28631738 in words is "twenty-eight million, six hundred thirty-one thousand, seven hundred thirty-eight".