28014390091 has 8 divisors (see below), whose sum is σ = 28627683840. Its totient is φ = 27401814888.

The previous prime is 28014390071. The next prime is 28014390097. The reversal of 28014390091 is 19009341082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28014390091 - 2⁵ = 28014390059 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28014390091.

It is not an unprimeable number, because it can be changed into a prime (28014390097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100431 + ... + 257128.

It is an arithmetic number, because the mean of its divisors is an integer number (3578460480).

Almost surely, 2^28014390091 is an apocalyptic number.

28014390091 is a deficient number, since it is larger than the sum of its proper divisors (613293749).

28014390091 is a wasteful number, since it uses less digits than its factorization.

28014390091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359273.

The product of its (nonzero) digits is 15552, while the sum is 37.

The spelling of 28014390091 in words is "twenty-eight billion, fourteen million, three hundred ninety thousand, ninety-one".