28018461 has 8 divisors (see below), whose sum is σ = 37384480. Its totient is φ = 18665712.

The previous prime is 28018447. The next prime is 28018469. The reversal of 28018461 is 16481082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28018461 - 2⁵ = 28018429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28018469) 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, 3786 + ... + 8388.

It is an arithmetic number, because the mean of its divisors is an integer number (4673060).

Almost surely, 2^28018461 is an apocalyptic number.

It is an amenable number.

28018461 is a deficient number, since it is larger than the sum of its proper divisors (9366019).

28018461 is a wasteful number, since it uses less digits than its factorization.

28018461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6635.

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 28018461 is about 5293.2467352278. The cubic root of 28018461 is about 303.7256187987.

The spelling of 28018461 in words is "twenty-eight million, eighteen thousand, four hundred sixty-one".