28776432 has 80 divisors (see below), whose sum is σ = 77995008. Its totient is φ = 9131520.

The previous prime is 28776421. The next prime is 28776437. The reversal of 28776432 is 23467782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28776437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123388 + ... + 123620.

Almost surely, 2^28776432 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 28776432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38997504).

28776432 is an abundant number, since it is smaller than the sum of its proper divisors (49218576).

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

28776432 is a wasteful number, since it uses less digits than its factorization.

28776432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358 (or 352 counting only the distinct ones).

The product of its digits is 112896, while the sum is 39.

The square root of 28776432 is about 5364.3668778338. The cubic root of 28776432 is about 306.4401372657.

The spelling of 28776432 in words is "twenty-eight million, seven hundred seventy-six thousand, four hundred thirty-two".