28602131 has 4 divisors (see below), whose sum is σ = 28646064. Its totient is φ = 28558200.

The previous prime is 28602113. The next prime is 28602157. The reversal of 28602131 is 13120682.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13120682 = 2 ⋅6560341.

It is a cyclic number.

It is not a de Polignac number, because 28602131 - 2¹⁰ = 28601107 is a prime.

It is a super-2 number, since 2×28602131² = 1636163795482322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28602097 and 28602106.

It is not an unprimeable number, because it can be changed into a prime (28602331) 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, 20975 + ... + 22296.

It is an arithmetic number, because the mean of its divisors is an integer number (7161516).

Almost surely, 2^28602131 is an apocalyptic number.

28602131 is a deficient number, since it is larger than the sum of its proper divisors (43933).

28602131 is an equidigital number, since it uses as much as digits as its factorization.

28602131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43932.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 28602131 is about 5348.0960163408. The cubic root of 28602131 is about 305.8201735798.

The spelling of 28602131 in words is "twenty-eight million, six hundred two thousand, one hundred thirty-one".