28624467 has 4 divisors (see below), whose sum is σ = 38165960. Its totient is φ = 19082976.

The previous prime is 28624451. The next prime is 28624493. The reversal of 28624467 is 76442682.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28624467 - 2⁴ = 28624451 is a prime.

It is a super-2 number, since 2×28624467² = 1638720222068178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28624367) 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 in 3 ways as a sum of consecutive naturals, for example, 4770742 + ... + 4770747.

It is an arithmetic number, because the mean of its divisors is an integer number (9541490).

Almost surely, 2^28624467 is an apocalyptic number.

28624467 is a deficient number, since it is larger than the sum of its proper divisors (9541493).

28624467 is an equidigital number, since it uses as much as digits as its factorization.

28624467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9541492.

The product of its digits is 129024, while the sum is 39.

The square root of 28624467 is about 5350.1838286175. The cubic root of 28624467 is about 305.8997599815.

It can be divided in two parts, 286 and 24467, that added together give a triangular number (24753 = T₂₂₂).

The spelling of 28624467 in words is "twenty-eight million, six hundred twenty-four thousand, four hundred sixty-seven".