28002432 has 32 divisors (see below), whose sum is σ = 74382480. Its totient is φ = 9334016.

The previous prime is 28002421. The next prime is 28002433. The reversal of 28002432 is 23420082.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 28002399 and 28002408.

It is not an unprimeable number, because it can be changed into a prime (28002433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36078 + ... + 36845.

Almost surely, 2^28002432 is an apocalyptic number.

It is an amenable number.

28002432 is an abundant number, since it is smaller than the sum of its proper divisors (46380048).

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

28002432 is an equidigital number, since it uses as much as digits as its factorization.

28002432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72940 (or 72928 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 28002432 is about 5291.7324195390. The cubic root of 28002432 is about 303.6676885811.

The spelling of 28002432 in words is "twenty-eight million, two thousand, four hundred thirty-two".