28466389 has 8 divisors (see below), whose sum is σ = 34245440. Its totient is φ = 23115456.

The previous prime is 28466363. The next prime is 28466407. The reversal of 28466389 is 98366482.

It is a happy number.

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

It is not a de Polignac number, because 28466389 - 2¹⁷ = 28335317 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 (28466329) 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, 106884 + ... + 107149.

It is an arithmetic number, because the mean of its divisors is an integer number (4280680).

Almost surely, 2^28466389 is an apocalyptic number.

It is an amenable number.

28466389 is a deficient number, since it is larger than the sum of its proper divisors (5779051).

28466389 is a wasteful number, since it uses less digits than its factorization.

28466389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214059.

The product of its digits is 497664, while the sum is 46.

The square root of 28466389 is about 5335.3902387735. The cubic root of 28466389 is about 305.3356119353.

The spelling of 28466389 in words is "twenty-eight million, four hundred sixty-six thousand, three hundred eighty-nine".