28740844 has 48 divisors (see below), whose sum is σ = 59673600. Its totient is φ = 11966400.

The previous prime is 28740799. The next prime is 28740851. The reversal of 28740844 is 44804782.

It is a super-3 number, since 3×28740844³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25362 + ... + 26470.

It is an arithmetic number, because the mean of its divisors is an integer number (1243200).

Almost surely, 2^28740844 is an apocalyptic number.

It is an amenable number.

28740844 is an abundant number, since it is smaller than the sum of its proper divisors (30932756).

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

28740844 is a wasteful number, since it uses less digits than its factorization.

28740844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1174 (or 1172 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 37.

The square root of 28740844 is about 5361.0487779911. The cubic root of 28740844 is about 306.3137596526.

It can be divided in two parts, 28740 and 844, that added together give a square (29584 = 172²).

The spelling of 28740844 in words is "twenty-eight million, seven hundred forty thousand, eight hundred forty-four".