28504467 has 20 divisors (see below), whose sum is σ = 43736176. Its totient is φ = 18487440.

The previous prime is 28504459. The next prime is 28504499. The reversal of 28504467 is 76440582.

It is not a de Polignac number, because 28504467 - 2³ = 28504459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28504417) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1759 + ... + 7752.

Almost surely, 2^28504467 is an apocalyptic number.

28504467 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

28504467 is a deficient number, since it is larger than the sum of its proper divisors (15231709).

28504467 is an equidigital number, since it uses as much as digits as its factorization.

28504467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9560 (or 9551 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 28504467 is about 5338.9574825054. The cubic root of 28504467 is about 305.4716951033.

The spelling of 28504467 in words is "twenty-eight million, five hundred four thousand, four hundred sixty-seven".