28889404 has 12 divisors (see below), whose sum is σ = 50621704. Its totient is φ = 14426064.

The previous prime is 28889389. The next prime is 28889407. The reversal of 28889404 is 40498882.

It is a super-3 number, since 3×28889404³ (a number of 23 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28889407) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 822 + ... + 7645.

Almost surely, 2^28889404 is an apocalyptic number.

It is an amenable number.

28889404 is a deficient number, since it is larger than the sum of its proper divisors (21732300).

28889404 is a wasteful number, since it uses less digits than its factorization.

28889404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9324 (or 9322 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 43.

The square root of 28889404 is about 5374.8864174046. The cubic root of 28889404 is about 306.8406264637.

The spelling of 28889404 in words is "twenty-eight million, eight hundred eighty-nine thousand, four hundred four".