28635478 has 4 divisors (see below), whose sum is σ = 42953220. Its totient is φ = 14317738.

The previous prime is 28635469. The next prime is 28635487. The reversal of 28635478 is 87453682.

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

It is an interprime number because it is at equal distance from previous prime (28635469) and next prime (28635487).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7158868 + ... + 7158871.

It is an arithmetic number, because the mean of its divisors is an integer number (10738305).

Almost surely, 2^28635478 is an apocalyptic number.

28635478 is a deficient number, since it is larger than the sum of its proper divisors (14317742).

28635478 is a wasteful number, since it uses less digits than its factorization.

28635478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14317741.

The product of its digits is 322560, while the sum is 43.

The square root of 28635478 is about 5351.2127597396. The cubic root of 28635478 is about 305.9389785337.

The spelling of 28635478 in words is "twenty-eight million, six hundred thirty-five thousand, four hundred seventy-eight".