28626131 has 4 divisors (see below), whose sum is σ = 28637352. Its totient is φ = 28614912.

The previous prime is 28626107. The next prime is 28626139. The reversal of 28626131 is 13162682.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28626131 - 2¹⁸ = 28363987 is a prime.

It is a super-2 number, since 2×28626131² = 1638910752058322, 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 = 28626094 and 28626103.

It is not an unprimeable number, because it can be changed into a prime (28626139) 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, 275 + ... + 7571.

It is an arithmetic number, because the mean of its divisors is an integer number (7159338).

Almost surely, 2^28626131 is an apocalyptic number.

28626131 is a deficient number, since it is larger than the sum of its proper divisors (11221).

28626131 is an equidigital number, since it uses as much as digits as its factorization.

28626131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11220.

The product of its digits is 3456, while the sum is 29.

The square root of 28626131 is about 5350.3393350329. The cubic root of 28626131 is about 305.9056873971.

The spelling of 28626131 in words is "twenty-eight million, six hundred twenty-six thousand, one hundred thirty-one".