28819478 has 4 divisors (see below), whose sum is σ = 43229220. Its totient is φ = 14409738.

The previous prime is 28819477. The next prime is 28819493. The reversal of 28819478 is 87491882.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28819477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7204868 + ... + 7204871.

It is an arithmetic number, because the mean of its divisors is an integer number (10807305).

Almost surely, 2^28819478 is an apocalyptic number.

28819478 is a deficient number, since it is larger than the sum of its proper divisors (14409742).

28819478 is a wasteful number, since it uses less digits than its factorization.

28819478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14409741.

The product of its digits is 258048, while the sum is 47.

The square root of 28819478 is about 5368.3775947673. The cubic root of 28819478 is about 306.5928600474.

The spelling of 28819478 in words is "twenty-eight million, eight hundred nineteen thousand, four hundred seventy-eight".