28809850 has 24 divisors (see below), whose sum is σ = 55317888. Its totient is φ = 11151600.

The previous prime is 28809841. The next prime is 28809887. The reversal of 28809850 is 5890882.

It is a happy number.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7744 + ... + 10843.

It is an arithmetic number, because the mean of its divisors is an integer number (2304912).

Almost surely, 2^28809850 is an apocalyptic number.

28809850 is a deficient number, since it is larger than the sum of its proper divisors (26508038).

28809850 is a wasteful number, since it uses less digits than its factorization.

28809850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18630 (or 18625 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 40.

The square root of 28809850 is about 5367.4807871105. The cubic root of 28809850 is about 306.5587141035.

The spelling of 28809850 in words is "twenty-eight million, eight hundred nine thousand, eight hundred fifty".