28912632 has 64 divisors (see below), whose sum is σ = 83393280. Its totient is φ = 8182272.

The previous prime is 28912621. The next prime is 28912643. The reversal of 28912632 is 23621982.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28912621) and next prime (28912643).

It is a junction number, because it is equal to n+sod(n) for n = 28912593 and 28912602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18223 + ... + 19745.

It is an arithmetic number, because the mean of its divisors is an integer number (1303020).

Almost surely, 2^28912632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28912632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41696640).

28912632 is an abundant number, since it is smaller than the sum of its proper divisors (54480648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28912632 is a wasteful number, since it uses less digits than its factorization.

28912632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1652 (or 1648 counting only the distinct ones).

The product of its digits is 10368, while the sum is 33.

The square root of 28912632 is about 5377.0467730902. The cubic root of 28912632 is about 306.9228409754.

It can be divided in two parts, 289 and 12632, that added together give a palindrome (12921).

The spelling of 28912632 in words is "twenty-eight million, nine hundred twelve thousand, six hundred thirty-two".