28099701 has 24 divisors (see below), whose sum is σ = 46597824. Its totient is φ = 15984000.

The previous prime is 28099679. The next prime is 28099717. The reversal of 28099701 is 10799082.

It is a happy number.

It is not a de Polignac number, because 28099701 - 2¹⁴ = 28083317 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28099751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14925 + ... + 16701.

It is an arithmetic number, because the mean of its divisors is an integer number (1941576).

Almost surely, 2^28099701 is an apocalyptic number.

28099701 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

28099701 is a deficient number, since it is larger than the sum of its proper divisors (18498123).

28099701 is a wasteful number, since it uses less digits than its factorization.

28099701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041 (or 2038 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 28099701 is about 5300.9151096768. The cubic root of 28099701 is about 304.0188880520.

The spelling of 28099701 in words is "twenty-eight million, ninety-nine thousand, seven hundred one".