28245638 has 16 divisors (see below), whose sum is σ = 43560720. Its totient is φ = 13728000.

The previous prime is 28245629. The next prime is 28245641. The reversal of 28245638 is 83654282.

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, 32453 + ... + 33311.

It is an arithmetic number, because the mean of its divisors is an integer number (2722545).

Almost surely, 2^28245638 is an apocalyptic number.

28245638 is a deficient number, since it is larger than the sum of its proper divisors (15315082).

28245638 is a wasteful number, since it uses less digits than its factorization.

28245638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1303.

The product of its digits is 92160, while the sum is 38.

The square root of 28245638 is about 5314.6625480834. The cubic root of 28245638 is about 304.5442912341.

The spelling of 28245638 in words is "twenty-eight million, two hundred forty-five thousand, six hundred thirty-eight".