28160145 has 48 divisors (see below), whose sum is σ = 54027792. Its totient is φ = 13478400.

The previous prime is 28160137. The next prime is 28160173. The reversal of 28160145 is 54106182.

It can be written as a sum of positive squares in 8 ways, for example, as 4511376 + 23648769 = 2124^2 + 4863^2 .

It is not a de Polignac number, because 28160145 - 2³ = 28160137 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20995 + ... + 22295.

It is an arithmetic number, because the mean of its divisors is an integer number (1125579).

Almost surely, 2^28160145 is an apocalyptic number.

It is an amenable number.

28160145 is a deficient number, since it is larger than the sum of its proper divisors (25867647).

28160145 is a wasteful number, since it uses less digits than its factorization.

28160145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362 (or 1359 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 28160145 is about 5306.6133267839. The cubic root of 28160145 is about 304.2367190457.

The spelling of 28160145 in words is "twenty-eight million, one hundred sixty thousand, one hundred forty-five".