28489837 has 8 divisors (see below), whose sum is σ = 29487872. Its totient is φ = 27496800.

The previous prime is 28489831. The next prime is 28489859. The reversal of 28489837 is 73898482.

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 28489837 - 2³ = 28489829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28489831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13162 + ... + 15172.

It is an arithmetic number, because the mean of its divisors is an integer number (3685984).

Almost surely, 2^28489837 is an apocalyptic number.

It is an amenable number.

28489837 is a deficient number, since it is larger than the sum of its proper divisors (998035).

28489837 is a wasteful number, since it uses less digits than its factorization.

28489837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2499.

The product of its digits is 774144, while the sum is 49.

The square root of 28489837 is about 5337.5871889834. The cubic root of 28489837 is about 305.4194247498.

The spelling of 28489837 in words is "twenty-eight million, four hundred eighty-nine thousand, eight hundred thirty-seven".