28875586 has 4 divisors (see below), whose sum is σ = 43313382. Its totient is φ = 14437792.

The previous prime is 28875547. The next prime is 28875599. The reversal of 28875586 is 68557882.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 24750625 + 4124961 = 4975^2 + 2031^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7218895 + ... + 7218898.

Almost surely, 2^28875586 is an apocalyptic number.

28875586 is a deficient number, since it is larger than the sum of its proper divisors (14437796).

28875586 is a wasteful number, since it uses less digits than its factorization.

28875586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14437795.

The product of its digits is 1075200, while the sum is 49.

The square root of 28875586 is about 5373.6008411493. The cubic root of 28875586 is about 306.7916973367.

The spelling of 28875586 in words is "twenty-eight million, eight hundred seventy-five thousand, five hundred eighty-six".