28872033 has 16 divisors (see below), whose sum is σ = 39137280. Its totient is φ = 18930384.

The previous prime is 28872013. The next prime is 28872037. The reversal of 28872033 is 33027882.

It is a happy number.

It is not a de Polignac number, because 28872033 - 2¹⁰ = 28871009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28871985 and 28872003.

It is not an unprimeable number, because it can be changed into a prime (28872037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68698 + ... + 69116.

It is an arithmetic number, because the mean of its divisors is an integer number (2446080).

Almost surely, 2^28872033 is an apocalyptic number.

It is an amenable number.

28872033 is a deficient number, since it is larger than the sum of its proper divisors (10265247).

28872033 is a wasteful number, since it uses less digits than its factorization.

28872033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 28872033 is about 5373.2702332937. The cubic root of 28872033 is about 306.7791137466.

The spelling of 28872033 in words is "twenty-eight million, eight hundred seventy-two thousand, thirty-three".