28442479 has 32 divisors (see below), whose sum is σ = 34461504. Its totient is φ = 23224320.

The previous prime is 28442443. The next prime is 28442489. The reversal of 28442479 is 97424482.

It is a cyclic number.

It is not a de Polignac number, because 28442479 - 2⁹ = 28441967 is a prime.

It is a super-2 number, since 2×28442479² = 1617949223330882, 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 (28442429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 389587 + ... + 389659.

It is an arithmetic number, because the mean of its divisors is an integer number (1076922).

Almost surely, 2^28442479 is an apocalyptic number.

28442479 is a deficient number, since it is larger than the sum of its proper divisors (6019025).

28442479 is a wasteful number, since it uses less digits than its factorization.

28442479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187.

The product of its digits is 129024, while the sum is 40.

The square root of 28442479 is about 5333.1490697336. The cubic root of 28442479 is about 305.2501003348.

The spelling of 28442479 in words is "twenty-eight million, four hundred forty-two thousand, four hundred seventy-nine".