28146731 has 2 divisors, whose sum is σ = 28146732. Its totient is φ = 28146730.

The previous prime is 28146721. The next prime is 28146737. The reversal of 28146731 is 13764182.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28146731 is a prime.

It is a super-2 number, since 2×28146731² = 1584476931972722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28146737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14073365 + 14073366.

It is an arithmetic number, because the mean of its divisors is an integer number (14073366).

Almost surely, 2^28146731 is an apocalyptic number.

28146731 is a deficient number, since it is larger than the sum of its proper divisors (1).

28146731 is an equidigital number, since it uses as much as digits as its factorization.

28146731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 32.

The square root of 28146731 is about 5305.3492816213. The cubic root of 28146731 is about 304.1884039593.

The spelling of 28146731 in words is "twenty-eight million, one hundred forty-six thousand, seven hundred thirty-one".