28407 has 8 divisors (see below), whose sum is σ = 40176. Its totient is φ = 17792.

The previous prime is 28403. The next prime is 28409. The reversal of 28407 is 70482.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28407 - 2² = 28403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28403) 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, 228 + ... + 329.

It is an arithmetic number, because the mean of its divisors is an integer number (5022).

2²⁸⁴⁰⁷ is an apocalyptic number.

28407 is a deficient number, since it is larger than the sum of its proper divisors (11769).

28407 is a wasteful number, since it uses less digits than its factorization.

28407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577.

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 28407 is about 168.5437628629. The cubic root of 28407 is about 30.5123125063.

Adding to 28407 its reverse (70482), we get a palindrome (98889).

It can be divided in two parts, 28 and 407, that added together give a triangular number (435 = T₂₉).

The spelling of 28407 in words is "twenty-eight thousand, four hundred seven".