28870850 has 24 divisors (see below), whose sum is σ = 54240948. Its totient is φ = 11432000.

The previous prime is 28870837. The next prime is 28870859. The reversal of 28870850 is 5807882.

It can be written as a sum of positive squares in 6 ways, for example, as 19864849 + 9006001 = 4457^2 + 3001^2 .

It is not an unprimeable number, because it can be changed into a prime (28870859) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2192 + ... + 7908.

Almost surely, 2^28870850 is an apocalyptic number.

28870850 is a deficient number, since it is larger than the sum of its proper divisors (25370098).

28870850 is a wasteful number, since it uses less digits than its factorization.

28870850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5830 (or 5825 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 38.

The square root of 28870850 is about 5373.1601502282. The cubic root of 28870850 is about 306.7749237097.

The spelling of 28870850 in words is "twenty-eight million, eight hundred seventy thousand, eight hundred fifty".