28631146 has 4 divisors (see below), whose sum is σ = 42946722. Its totient is φ = 14315572.

The previous prime is 28631137. The next prime is 28631153. The reversal of 28631146 is 64113682.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 28462225 + 168921 = 5335^2 + 411^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7157785 + ... + 7157788.

Almost surely, 2^28631146 is an apocalyptic number.

28631146 is a deficient number, since it is larger than the sum of its proper divisors (14315576).

28631146 is a wasteful number, since it uses less digits than its factorization.

28631146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14315575.

The product of its digits is 6912, while the sum is 31.

The square root of 28631146 is about 5350.8079763714. The cubic root of 28631146 is about 305.9235501841.

The spelling of 28631146 in words is "twenty-eight million, six hundred thirty-one thousand, one hundred forty-six".