28490161 has 8 divisors (see below), whose sum is σ = 32896640. Its totient is φ = 24167808.

The previous prime is 28490153. The next prime is 28490167. The reversal of 28490161 is 16109482.

It is a happy number.

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

It is not a de Polignac number, because 28490161 - 2³ = 28490153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28490167) 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, 20301 + ... + 21658.

It is an arithmetic number, because the mean of its divisors is an integer number (4112080).

Almost surely, 2^28490161 is an apocalyptic number.

It is an amenable number.

28490161 is a deficient number, since it is larger than the sum of its proper divisors (4406479).

28490161 is an equidigital number, since it uses as much as digits as its factorization.

28490161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42063.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 28490161 is about 5337.6175396894. The cubic root of 28490161 is about 305.4205825371.

The spelling of 28490161 in words is "twenty-eight million, four hundred ninety thousand, one hundred sixty-one".