28051099 has 4 divisors (see below), whose sum is σ = 29270736. Its totient is φ = 26831464.

The previous prime is 28051097. The next prime is 28051129. The reversal of 28051099 is 99015082.

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

It is a cyclic number.

It is not a de Polignac number, because 28051099 - 2¹ = 28051097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28051097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 609784 + ... + 609829.

It is an arithmetic number, because the mean of its divisors is an integer number (7317684).

Almost surely, 2^28051099 is an apocalyptic number.

28051099 is a deficient number, since it is larger than the sum of its proper divisors (1219637).

28051099 is a wasteful number, since it uses less digits than its factorization.

28051099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1219636.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 28051099 is about 5296.3288228734. The cubic root of 28051099 is about 303.8435071450.

The spelling of 28051099 in words is "twenty-eight million, fifty-one thousand, ninety-nine".