28413844 has 6 divisors (see below), whose sum is σ = 49724234. Its totient is φ = 14206920.

The previous prime is 28413799. The next prime is 28413857. The reversal of 28413844 is 44831482.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19184400 + 9229444 = 4380^2 + 3038^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3551727 + ... + 3551734.

Almost surely, 2^28413844 is an apocalyptic number.

It is an amenable number.

28413844 is a deficient number, since it is larger than the sum of its proper divisors (21310390).

28413844 is a wasteful number, since it uses less digits than its factorization.

28413844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7103465 (or 7103463 counting only the distinct ones).

The product of its digits is 24576, while the sum is 34.

The square root of 28413844 is about 5330.4637696921. The cubic root of 28413844 is about 305.1476271808.

The spelling of 28413844 in words is "twenty-eight million, four hundred thirteen thousand, eight hundred forty-four".