28892417 has 4 divisors (see below), whose sum is σ = 28905216. Its totient is φ = 28879620.

The previous prime is 28892399. The next prime is 28892429. The reversal of 28892417 is 71429882.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28892417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28892317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2009 + ... + 7862.

It is an arithmetic number, because the mean of its divisors is an integer number (7226304).

Almost surely, 2^28892417 is an apocalyptic number.

It is an amenable number.

28892417 is a deficient number, since it is larger than the sum of its proper divisors (12799).

28892417 is an equidigital number, since it uses as much as digits as its factorization.

28892417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12798.

The product of its digits is 64512, while the sum is 41.

The square root of 28892417 is about 5375.1666950896. The cubic root of 28892417 is about 306.8512933350.

The spelling of 28892417 in words is "twenty-eight million, eight hundred ninety-two thousand, four hundred seventeen".