28465331 has 2 divisors, whose sum is σ = 28465332. Its totient is φ = 28465330.

The previous prime is 28465319. The next prime is 28465337. The reversal of 28465331 is 13356482.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28465331 - 2⁶ = 28465267 is a prime.

It is a super-2 number, since 2×28465331² = 1620550137879122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28465337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14232665 + 14232666.

It is an arithmetic number, because the mean of its divisors is an integer number (14232666).

Almost surely, 2^28465331 is an apocalyptic number.

28465331 is a deficient number, since it is larger than the sum of its proper divisors (1).

28465331 is an equidigital number, since it uses as much as digits as its factorization.

28465331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 32.

The square root of 28465331 is about 5335.2910885911. The cubic root of 28465331 is about 305.3318291223.

The spelling of 28465331 in words is "twenty-eight million, four hundred sixty-five thousand, three hundred thirty-one".