28501633 has 4 divisors (see below), whose sum is σ = 28661040. Its totient is φ = 28342228.

The previous prime is 28501621. The next prime is 28501657. The reversal of 28501633 is 33610582.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28501633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28501663) 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, 79435 + ... + 79792.

It is an arithmetic number, because the mean of its divisors is an integer number (7165260).

Almost surely, 2^28501633 is an apocalyptic number.

It is an amenable number.

28501633 is a deficient number, since it is larger than the sum of its proper divisors (159407).

28501633 is a wasteful number, since it uses less digits than its factorization.

28501633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159406.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 28501633 is about 5338.6920682879. The cubic root of 28501633 is about 305.4615711290.

The spelling of 28501633 in words is "twenty-eight million, five hundred one thousand, six hundred thirty-three".