28915033 has 16 divisors (see below), whose sum is σ = 34320384. Its totient is φ = 23838480.

The previous prime is 28915031. The next prime is 28915039. The reversal of 28915033 is 33051982.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28915033 - 2¹ = 28915031 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a junction number, because it is equal to n+sod(n) for n = 28914986 and 28915004.

It is not an unprimeable number, because it can be changed into a prime (28915031) 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, 48966 + ... + 49552.

It is an arithmetic number, because the mean of its divisors is an integer number (2145024).

Almost surely, 2^28915033 is an apocalyptic number.

It is an amenable number.

28915033 is a deficient number, since it is larger than the sum of its proper divisors (5405351).

28915033 is a wasteful number, since it uses less digits than its factorization.

28915033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 28915033 is about 5377.2700322747. The cubic root of 28915033 is about 306.9313367008.

The spelling of 28915033 in words is "twenty-eight million, nine hundred fifteen thousand, thirty-three".