28544290 has 16 divisors (see below), whose sum is σ = 51480000. Its totient is φ = 11395440.

The previous prime is 28544267. The next prime is 28544293. The reversal of 28544290 is 9244582.

It is not an unprimeable number, because it can be changed into a prime (28544293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3211 + ... + 8209.

It is an arithmetic number, because the mean of its divisors is an integer number (3217500).

Almost surely, 2^28544290 is an apocalyptic number.

28544290 is a deficient number, since it is larger than the sum of its proper divisors (22935710).

28544290 is a wasteful number, since it uses less digits than its factorization.

28544290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5577.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 28544290 is about 5342.6856542380. The cubic root of 28544290 is about 305.6138849648.

The spelling of 28544290 in words is "twenty-eight million, five hundred forty-four thousand, two hundred ninety".