28873444 has 12 divisors (see below), whose sum is σ = 52271100. Its totient is φ = 13938848.

The previous prime is 28873433. The next prime is 28873447. The reversal of 28873444 is 44437882.

It can be written as a sum of positive squares in 2 ways, for example, as 10810944 + 18062500 = 3288^2 + 4250^2 .

It is a super-2 number, since 2×28873444² = 1667351536842272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28873397 and 28873406.

It is not an unprimeable number, because it can be changed into a prime (28873447) 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, 124339 + ... + 124570.

It is an arithmetic number, because the mean of its divisors is an integer number (4355925).

Almost surely, 2^28873444 is an apocalyptic number.

It is an amenable number.

28873444 is a deficient number, since it is larger than the sum of its proper divisors (23397656).

28873444 is a wasteful number, since it uses less digits than its factorization.

28873444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248942 (or 248940 counting only the distinct ones).

The product of its digits is 172032, while the sum is 40.

The square root of 28873444 is about 5373.4015297575. The cubic root of 28873444 is about 306.7841111811.

The spelling of 28873444 in words is "twenty-eight million, eight hundred seventy-three thousand, four hundred forty-four".