28099101 has 16 divisors (see below), whose sum is σ = 38301120. Its totient is φ = 18318720.

The previous prime is 28099067. The next prime is 28099117. The reversal of 28099101 is 10199082.

It is not a de Polignac number, because 28099101 - 2⁹ = 28098589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28099301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42310 + ... + 42968.

It is an arithmetic number, because the mean of its divisors is an integer number (2393820).

Almost surely, 2^28099101 is an apocalyptic number.

It is an amenable number.

28099101 is a deficient number, since it is larger than the sum of its proper divisors (10202019).

28099101 is a wasteful number, since it uses less digits than its factorization.

28099101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 28099101 is about 5300.8585153728. The cubic root of 28099101 is about 304.0167241780.

The spelling of 28099101 in words is "twenty-eight million, ninety-nine thousand, one hundred one".