28490739 has 8 divisors (see below), whose sum is σ = 38016720. Its totient is φ = 18979296.

The previous prime is 28490729. The next prime is 28490741. The reversal of 28490739 is 93709482.

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

It is not a de Polignac number, because 28490739 - 2⁴ = 28490723 is a prime.

It is a super-2 number, since 2×28490739² = 1623444417532242, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 28490739.

It is not an unprimeable number, because it can be changed into a prime (28490719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2349 + ... + 7905.

It is an arithmetic number, because the mean of its divisors is an integer number (4752090).

Almost surely, 2^28490739 is an apocalyptic number.

28490739 is a deficient number, since it is larger than the sum of its proper divisors (9525981).

28490739 is a wasteful number, since it uses less digits than its factorization.

28490739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7269.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 28490739 is about 5337.6716834215. The cubic root of 28490739 is about 305.4226479508.

The spelling of 28490739 in words is "twenty-eight million, four hundred ninety thousand, seven hundred thirty-nine".