28011850 has 12 divisors (see below), whose sum is σ = 52102134. Its totient is φ = 11204720.

The previous prime is 28011847. The next prime is 28011853. The reversal of 28011850 is 5811082.

It is an interprime number because it is at equal distance from previous prime (28011847) and next prime (28011853).

It can be written as a sum of positive squares in 3 ways, for example, as 26635921 + 1375929 = 5161^2 + 1173^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (28011853) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 280069 + ... + 280168.

Almost surely, 2^28011850 is an apocalyptic number.

28011850 is a deficient number, since it is larger than the sum of its proper divisors (24090284).

28011850 is a wasteful number, since it uses less digits than its factorization.

28011850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560249 (or 560244 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 28011850 is about 5292.6222234352. The cubic root of 28011850 is about 303.7017287403.

The spelling of 28011850 in words is "twenty-eight million, eleven thousand, eight hundred fifty".