28749244 has 24 divisors (see below), whose sum is σ = 53706240. Its totient is φ = 13418496.

The previous prime is 28749229. The next prime is 28749251. The reversal of 28749244 is 44294782.

It is a junction number, because it is equal to n+sod(n) for n = 28749197 and 28749206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6972 + ... + 10300.

It is an arithmetic number, because the mean of its divisors is an integer number (2237760).

Almost surely, 2^28749244 is an apocalyptic number.

It is an amenable number.

28749244 is a deficient number, since it is larger than the sum of its proper divisors (24956996).

28749244 is a wasteful number, since it uses less digits than its factorization.

28749244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3477 (or 3475 counting only the distinct ones).

The product of its digits is 129024, while the sum is 40.

The square root of 28749244 is about 5361.8321495549. The cubic root of 28749244 is about 306.3435985461.

The spelling of 28749244 in words is "twenty-eight million, seven hundred forty-nine thousand, two hundred forty-four".