28860407 has 12 divisors (see below), whose sum is σ = 31498200. Its totient is φ = 26418816.

The previous prime is 28860401. The next prime is 28860413. The reversal of 28860407 is 70406882.

It is an interprime number because it is at equal distance from previous prime (28860401) and next prime (28860413).

It is not a de Polignac number, because 28860407 - 2²⁰ = 27811831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28860401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9344 + ... + 12042.

It is an arithmetic number, because the mean of its divisors is an integer number (2624850).

Almost surely, 2^28860407 is an apocalyptic number.

28860407 is a deficient number, since it is larger than the sum of its proper divisors (2637793).

28860407 is a wasteful number, since it uses less digits than its factorization.

28860407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2770 (or 2753 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 28860407 is about 5372.1882878395. The cubic root of 28860407 is about 306.7379309543.

The spelling of 28860407 in words is "twenty-eight million, eight hundred sixty thousand, four hundred seven".