28490605 has 16 divisors (see below), whose sum is σ = 40166784. Its totient is φ = 19126080.

The previous prime is 28490603. The next prime is 28490617. The reversal of 28490605 is 50609482.

It is a happy number.

It is not a de Polignac number, because 28490605 - 2¹ = 28490603 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 (28490603) 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, 19209 + ... + 20638.

It is an arithmetic number, because the mean of its divisors is an integer number (2510424).

Almost surely, 2^28490605 is an apocalyptic number.

It is an amenable number.

28490605 is a deficient number, since it is larger than the sum of its proper divisors (11676179).

28490605 is a wasteful number, since it uses less digits than its factorization.

28490605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39876.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 28490605 is about 5337.6591311173. The cubic root of 28490605 is about 305.4221691204.

The spelling of 28490605 in words is "twenty-eight million, four hundred ninety thousand, six hundred five".