28154831 has 2 divisors, whose sum is σ = 28154832. Its totient is φ = 28154830.

The previous prime is 28154801. The next prime is 28154849. The reversal of 28154831 is 13845182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28154831 - 2⁶ = 28154767 is a prime.

It is a super-2 number, since 2×28154831² = 1585389017277122, which contains 22 as substring.

It is a Sophie Germain prime.

It is equal to p_1750478 and since 28154831 and 1750478 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28154801) 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, 14077415 + 14077416.

It is an arithmetic number, because the mean of its divisors is an integer number (14077416).

Almost surely, 2^28154831 is an apocalyptic number.

28154831 is a deficient number, since it is larger than the sum of its proper divisors (1).

28154831 is an equidigital number, since it uses as much as digits as its factorization.

28154831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7680, while the sum is 32.

The square root of 28154831 is about 5306.1126071730. The cubic root of 28154831 is about 304.2175807017.

The spelling of 28154831 in words is "twenty-eight million, one hundred fifty-four thousand, eight hundred thirty-one".