28369489 has 8 divisors (see below), whose sum is σ = 29933280. Its totient is φ = 26812800.

The previous prime is 28369477. The next prime is 28369513. The reversal of 28369489 is 98496382.

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

It is not a de Polignac number, because 28369489 - 2⁵ = 28369457 is a prime.

It is a super-2 number, since 2×28369489² = 1609655812242242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28369409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7809 + ... + 10849.

It is an arithmetic number, because the mean of its divisors is an integer number (3741660).

Almost surely, 2^28369489 is an apocalyptic number.

It is an amenable number.

28369489 is a deficient number, since it is larger than the sum of its proper divisors (1563791).

28369489 is a wasteful number, since it uses less digits than its factorization.

28369489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3551.

The product of its digits is 746496, while the sum is 49.

The square root of 28369489 is about 5326.3016249552. The cubic root of 28369489 is about 304.9887624633.

The spelling of 28369489 in words is "twenty-eight million, three hundred sixty-nine thousand, four hundred eighty-nine".