28098045 has 12 divisors (see below), whose sum is σ = 48703356. Its totient is φ = 14985600.

The previous prime is 28098041. The next prime is 28098047. The reversal of 28098045 is 54089082.

It can be written as a sum of positive squares in 2 ways, for example, as 9253764 + 18844281 = 3042^2 + 4341^2 .

It is not a de Polignac number, because 28098045 - 2² = 28098041 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28098041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 312156 + ... + 312245.

It is an arithmetic number, because the mean of its divisors is an integer number (4058613).

Almost surely, 2^28098045 is an apocalyptic number.

It is an amenable number.

28098045 is a deficient number, since it is larger than the sum of its proper divisors (20605311).

28098045 is a wasteful number, since it uses less digits than its factorization.

28098045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624412 (or 624409 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 28098045 is about 5300.7589079301. The cubic root of 28098045 is about 304.0129156851.

The spelling of 28098045 in words is "twenty-eight million, ninety-eight thousand, forty-five".