28018495 has 16 divisors (see below), whose sum is σ = 35271360. Its totient is φ = 21337344.

The previous prime is 28018493. The next prime is 28018519. The reversal of 28018495 is 59481082.

It is a 8-Lehmer number, since φ(28018495) divides (28018495-1)⁸.

It is a cyclic number.

It is not a de Polignac number, because 28018495 - 2¹ = 28018493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28018493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9262 + ... + 11908.

It is an arithmetic number, because the mean of its divisors is an integer number (2204460).

Almost surely, 2^28018495 is an apocalyptic number.

28018495 is the 2647-th decagonal number.

28018495 is a deficient number, since it is larger than the sum of its proper divisors (7252865).

28018495 is a wasteful number, since it uses less digits than its factorization.

28018495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2754.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 28018495 is about 5293.2499468663. The cubic root of 28018495 is about 303.7257416542.

The spelling of 28018495 in words is "twenty-eight million, eighteen thousand, four hundred ninety-five".