28475878 has 8 divisors (see below), whose sum is σ = 43437960. Its totient is φ = 13996560.

The previous prime is 28475869. The next prime is 28475879. The reversal of 28475878 is 87857482.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28475879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120543 + ... + 120778.

It is an arithmetic number, because the mean of its divisors is an integer number (5429745).

Almost surely, 2^28475878 is an apocalyptic number.

28475878 is a deficient number, since it is larger than the sum of its proper divisors (14962082).

28475878 is a wasteful number, since it uses less digits than its factorization.

28475878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241382.

The product of its digits is 1003520, while the sum is 49.

The square root of 28475878 is about 5336.2794154729. The cubic root of 28475878 is about 305.3695350735.

The spelling of 28475878 in words is "twenty-eight million, four hundred seventy-five thousand, eight hundred seventy-eight".