28610431 has 2 divisors, whose sum is σ = 28610432. Its totient is φ = 28610430.

The previous prime is 28610411. The next prime is 28610503. The reversal of 28610431 is 13401682.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28610431 is a prime.

It is a super-2 number, since 2×28610431² = 1637113524011522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28610396 and 28610405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28610401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14305215 + 14305216.

It is an arithmetic number, because the mean of its divisors is an integer number (14305216).

Almost surely, 2^28610431 is an apocalyptic number.

28610431 is a deficient number, since it is larger than the sum of its proper divisors (1).

28610431 is an equidigital number, since it uses as much as digits as its factorization.

28610431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 28610431 is about 5348.8719371471. The cubic root of 28610431 is about 305.8497525175.

The spelling of 28610431 in words is "twenty-eight million, six hundred ten thousand, four hundred thirty-one".