28690417 has 8 divisors (see below), whose sum is σ = 33551936. Its totient is φ = 24019632.

The previous prime is 28690391. The next prime is 28690421. The reversal of 28690417 is 71409682.

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

It is not a de Polignac number, because 28690417 - 2⁷ = 28690289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28690477) 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, 47358 + ... + 47959.

It is an arithmetic number, because the mean of its divisors is an integer number (4193992).

Almost surely, 2^28690417 is an apocalyptic number.

It is an amenable number.

28690417 is a deficient number, since it is larger than the sum of its proper divisors (4861519).

28690417 is an equidigital number, since it uses as much as digits as its factorization.

28690417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95367.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 28690417 is about 5356.3436222856. The cubic root of 28690417 is about 306.1345080550.

The spelling of 28690417 in words is "twenty-eight million, six hundred ninety thousand, four hundred seventeen".