28939465 has 8 divisors (see below), whose sum is σ = 35085960. Its totient is φ = 22912512.

The previous prime is 28939459. The next prime is 28939499. The reversal of 28939465 is 56493982.

It can be written as a sum of positive squares in 4 ways, for example, as 5745609 + 23193856 = 2397^2 + 4816^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28939465 - 2⁵ = 28939433 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 29350 + ... + 30319.

It is an arithmetic number, because the mean of its divisors is an integer number (4385745).

Almost surely, 2^28939465 is an apocalyptic number.

It is an amenable number.

28939465 is a deficient number, since it is larger than the sum of its proper divisors (6146495).

28939465 is an equidigital number, since it uses as much as digits as its factorization.

28939465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59771.

The product of its digits is 466560, while the sum is 46.

The square root of 28939465 is about 5379.5413373261. The cubic root of 28939465 is about 307.0177604342.

The spelling of 28939465 in words is "twenty-eight million, nine hundred thirty-nine thousand, four hundred sixty-five".