28120369 has 8 divisors (see below), whose sum is σ = 29082240. Its totient is φ = 27174576.

The previous prime is 28120327. The next prime is 28120373. The reversal of 28120369 is 96302182.

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 28120369 - 2⁹ = 28119857 is a prime.

It is a super-2 number, since 2×28120369² = 1581510305392322, which contains 22 as substring.

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 28120369.

It is not an unprimeable number, because it can be changed into a prime (28127369) 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, 409 + ... + 7510.

It is an arithmetic number, because the mean of its divisors is an integer number (3635280).

Almost surely, 2^28120369 is an apocalyptic number.

It is an amenable number.

28120369 is a deficient number, since it is larger than the sum of its proper divisors (961871).

28120369 is an equidigital number, since it uses as much as digits as its factorization.

28120369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8039.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 28120369 is about 5302.8642260575. The cubic root of 28120369 is about 304.0934074981.

The spelling of 28120369 in words is "twenty-eight million, one hundred twenty thousand, three hundred sixty-nine".