28974631 has 6 divisors (see below), whose sum is σ = 33705240. Its totient is φ = 24835356.

The previous prime is 28974629. The next prime is 28974653. The reversal of 28974631 is 13647982.

It is not a de Polignac number, because 28974631 - 2¹ = 28974629 is a prime.

It is a super-2 number, since 2×28974631² = 1679058483172322, 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 (28974691) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 295611 + ... + 295708.

It is an arithmetic number, because the mean of its divisors is an integer number (5617540).

Almost surely, 2^28974631 is an apocalyptic number.

28974631 is a deficient number, since it is larger than the sum of its proper divisors (4730609).

28974631 is an equidigital number, since it uses as much as digits as its factorization.

28974631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591333 (or 591326 counting only the distinct ones).

The product of its digits is 72576, while the sum is 40.

The square root of 28974631 is about 5382.8088392586. The cubic root of 28974631 is about 307.1420683799.

The spelling of 28974631 in words is "twenty-eight million, nine hundred seventy-four thousand, six hundred thirty-one".