28676431 has 4 divisors (see below), whose sum is σ = 32773072. Its totient is φ = 24579792.

The previous prime is 28676411. The next prime is 28676437. The reversal of 28676431 is 13467682.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13467682 = 2 ⋅6733841.

It is a cyclic number.

It is not a de Polignac number, because 28676431 - 2⁷ = 28676303 is a prime.

It is a super-2 number, since 2×28676431² = 1644675389795522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28676437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2048310 + ... + 2048323.

It is an arithmetic number, because the mean of its divisors is an integer number (8193268).

Almost surely, 2^28676431 is an apocalyptic number.

28676431 is a deficient number, since it is larger than the sum of its proper divisors (4096641).

28676431 is an equidigital number, since it uses as much as digits as its factorization.

28676431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4096640.

The product of its digits is 48384, while the sum is 37.

The square root of 28676431 is about 5355.0379083626. The cubic root of 28676431 is about 306.0847551689.

The spelling of 28676431 in words is "twenty-eight million, six hundred seventy-six thousand, four hundred thirty-one".