28618617 has 8 divisors (see below), whose sum is σ = 40166560. Its totient is φ = 18074880.

The previous prime is 28618559. The next prime is 28618631. The reversal of 28618617 is 71681682.

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

It is not a de Polignac number, because 28618617 - 2⁷ = 28618489 is a prime.

It is a super-3 number, since 3×28618617³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28618637) 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, 250984 + ... + 251097.

It is an arithmetic number, because the mean of its divisors is an integer number (5020820).

Almost surely, 2^28618617 is an apocalyptic number.

It is an amenable number.

28618617 is a deficient number, since it is larger than the sum of its proper divisors (11547943).

28618617 is a wasteful number, since it uses less digits than its factorization.

28618617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502103.

The product of its digits is 32256, while the sum is 39.

The square root of 28618617 is about 5349.6370904950. The cubic root of 28618617 is about 305.8789195874.

The spelling of 28618617 in words is "twenty-eight million, six hundred eighteen thousand, six hundred seventeen".