28424131 has 2 divisors, whose sum is σ = 28424132. Its totient is φ = 28424130.

The previous prime is 28424129. The next prime is 28424141. The reversal of 28424131 is 13142482.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28424131 - 2¹ = 28424129 is a prime.

It is a super-2 number, since 2×28424131² = 1615862446210322, which contains 22 as substring.

Together with 28424129, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 28424096 and 28424105.

It is not a weakly prime, because it can be changed into another prime (28424141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14212065 + 14212066.

It is an arithmetic number, because the mean of its divisors is an integer number (14212066).

Almost surely, 2^28424131 is an apocalyptic number.

28424131 is a deficient number, since it is larger than the sum of its proper divisors (1).

28424131 is an equidigital number, since it uses as much as digits as its factorization.

28424131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1536, while the sum is 25.

The square root of 28424131 is about 5331.4286077936. The cubic root of 28424131 is about 305.1844481390.

The spelling of 28424131 in words is "twenty-eight million, four hundred twenty-four thousand, one hundred thirty-one".