28914444 has 72 divisors (see below), whose sum is σ = 81291392. Its totient is φ = 8605440.

The previous prime is 28914443. The next prime is 28914449. The reversal of 28914444 is 44441982.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 28914399 and 28914408.

It is not an unprimeable number, because it can be changed into a prime (28914443) 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, 13512 + ... + 15504.

Almost surely, 2^28914444 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 28914444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40645696).

28914444 is an abundant number, since it is smaller than the sum of its proper divisors (52376948).

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

28914444 is a wasteful number, since it uses less digits than its factorization.

28914444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2047 (or 2042 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 28914444 is about 5377.2152644282. The cubic root of 28914444 is about 306.9292526201.

The spelling of 28914444 in words is "twenty-eight million, nine hundred fourteen thousand, four hundred forty-four".