28412817 has 4 divisors (see below), whose sum is σ = 37883760. Its totient is φ = 18941876.

The previous prime is 28412803. The next prime is 28412819. The reversal of 28412817 is 71821482.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 28412817 - 2¹¹ = 28410769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28412819) 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, 4735467 + ... + 4735472.

It is an arithmetic number, because the mean of its divisors is an integer number (9470940).

Almost surely, 2^28412817 is an apocalyptic number.

It is an amenable number.

28412817 is a deficient number, since it is larger than the sum of its proper divisors (9470943).

28412817 is an equidigital number, since it uses as much as digits as its factorization.

28412817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9470942.

The product of its digits is 7168, while the sum is 33.

The square root of 28412817 is about 5330.3674357402. The cubic root of 28412817 is about 305.1439506820.

The spelling of 28412817 in words is "twenty-eight million, four hundred twelve thousand, eight hundred seventeen".