28618417 has 4 divisors (see below), whose sum is σ = 29862720. Its totient is φ = 27374116.

The previous prime is 28618411. The next prime is 28618433. The reversal of 28618417 is 71481682.

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 28618417 - 2¹⁵ = 28585649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28618411) 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, 622117 + ... + 622162.

It is an arithmetic number, because the mean of its divisors is an integer number (7465680).

Almost surely, 2^28618417 is an apocalyptic number.

It is an amenable number.

28618417 is a deficient number, since it is larger than the sum of its proper divisors (1244303).

28618417 is a wasteful number, since it uses less digits than its factorization.

28618417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244302.

The product of its digits is 21504, while the sum is 37.

The square root of 28618417 is about 5349.6183976056. The cubic root of 28618417 is about 305.8782070451.

The spelling of 28618417 in words is "twenty-eight million, six hundred eighteen thousand, four hundred seventeen".