28932631 has 24 divisors (see below), whose sum is σ = 36828384. Its totient is φ = 22239360.

The previous prime is 28932613. The next prime is 28932637. The reversal of 28932631 is 13623982.

It is a happy number.

It is not a de Polignac number, because 28932631 - 2⁷ = 28932503 is a prime.

It is a super-2 number, since 2×28932631² = 1674194273164322, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28932637) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43441 + ... + 44101.

It is an arithmetic number, because the mean of its divisors is an integer number (1534516).

Almost surely, 2^28932631 is an apocalyptic number.

28932631 is a deficient number, since it is larger than the sum of its proper divisors (7895753).

28932631 is a wasteful number, since it uses less digits than its factorization.

28932631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731 (or 718 counting only the distinct ones).

The product of its digits is 15552, while the sum is 34.

The square root of 28932631 is about 5378.9061155592. The cubic root of 28932631 is about 306.9935913102.

The spelling of 28932631 in words is "twenty-eight million, nine hundred thirty-two thousand, six hundred thirty-one".