28433051 has 4 divisors (see below), whose sum is σ = 28458504. Its totient is φ = 28407600.

The previous prime is 28433039. The next prime is 28433071. The reversal of 28433051 is 15033482.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15033482 = 2 ⋅7516741.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28433051 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 28433051.

It is not an unprimeable number, because it can be changed into a prime (28433011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10970 + ... + 13311.

It is an arithmetic number, because the mean of its divisors is an integer number (7114626).

Almost surely, 2^28433051 is an apocalyptic number.

28433051 is a deficient number, since it is larger than the sum of its proper divisors (25453).

28433051 is a wasteful number, since it uses less digits than its factorization.

28433051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25452.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 28433051 is about 5332.2650909346. The cubic root of 28433051 is about 305.2163689104.

The spelling of 28433051 in words is "twenty-eight million, four hundred thirty-three thousand, fifty-one".