28514631 has 4 divisors (see below), whose sum is σ = 38019512. Its totient is φ = 19009752.

The previous prime is 28514609. The next prime is 28514653. The reversal of 28514631 is 13641582.

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

It is an interprime number because it is at equal distance from previous prime (28514609) and next prime (28514653).

It is not a de Polignac number, because 28514631 - 2⁹ = 28514119 is a prime.

It is a super-2 number, since 2×28514631² = 1626168362132322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28514671) by changing a digit.

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, 4752436 + ... + 4752441.

It is an arithmetic number, because the mean of its divisors is an integer number (9504878).

Almost surely, 2^28514631 is an apocalyptic number.

28514631 is a deficient number, since it is larger than the sum of its proper divisors (9504881).

28514631 is an equidigital number, since it uses as much as digits as its factorization.

28514631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9504880.

The product of its digits is 5760, while the sum is 30.

The square root of 28514631 is about 5339.9092688921. The cubic root of 28514631 is about 305.5079987155.

The spelling of 28514631 in words is "twenty-eight million, five hundred fourteen thousand, six hundred thirty-one".