28138033499 has 8 divisors (see below), whose sum is σ = 28277921040. Its totient is φ = 27998208000.

The previous prime is 28138033403. The next prime is 28138033507. The reversal of 28138033499 is 99433083182.

It is a happy number.

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 28138033499 - 2²⁰ = 28136984923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28138033699) 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, 1086299 + ... + 1111899.

It is an arithmetic number, because the mean of its divisors is an integer number (3534740130).

Almost surely, 2^28138033499 is an apocalyptic number.

28138033499 is a deficient number, since it is larger than the sum of its proper divisors (139887541).

28138033499 is a wasteful number, since it uses less digits than its factorization.

28138033499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31021.

The product of its (nonzero) digits is 1119744, while the sum is 50.

The spelling of 28138033499 in words is "twenty-eight billion, one hundred thirty-eight million, thirty-three thousand, four hundred ninety-nine".