28970631 has 12 divisors (see below), whose sum is σ = 41917408. Its totient is φ = 19281024.

The previous prime is 28970621. The next prime is 28970633. The reversal of 28970631 is 13607982.

It is not a de Polignac number, because 28970631 - 2⁹ = 28970119 is a prime.

It is a super-2 number, since 2×28970631² = 1678594921076322, 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 (28970633) 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 11 ways as a sum of consecutive naturals, for example, 3666 + ... + 8448.

Almost surely, 2^28970631 is an apocalyptic number.

28970631 is a deficient number, since it is larger than the sum of its proper divisors (12946777).

28970631 is a wasteful number, since it uses less digits than its factorization.

28970631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5462 (or 5459 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 28970631 is about 5382.4372732063. The cubic root of 28970631 is about 307.1279338908.

The spelling of 28970631 in words is "twenty-eight million, nine hundred seventy thousand, six hundred thirty-one".