28871446 has 4 divisors (see below), whose sum is σ = 43307172. Its totient is φ = 14435722.

The previous prime is 28871429. The next prime is 28871459. The reversal of 28871446 is 64417882.

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

It is a junction number, because it is equal to n+sod(n) for n = 28871399 and 28871408.

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, 7217860 + ... + 7217863.

It is an arithmetic number, because the mean of its divisors is an integer number (10826793).

Almost surely, 2^28871446 is an apocalyptic number.

28871446 is a deficient number, since it is larger than the sum of its proper divisors (14435726).

28871446 is a wasteful number, since it uses less digits than its factorization.

28871446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14435725.

The product of its digits is 86016, while the sum is 40.

The square root of 28871446 is about 5373.2156107865. The cubic root of 28871446 is about 306.7770346809. Note that the first 3 decimals are identical.

The spelling of 28871446 in words is "twenty-eight million, eight hundred seventy-one thousand, four hundred forty-six".