28235916 has 36 divisors (see below), whose sum is σ = 73679424. Its totient is φ = 9108000.

The previous prime is 28235899. The next prime is 28235917. The reversal of 28235916 is 61953282.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (28235917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11535 + ... + 13766.

Almost surely, 2^28235916 is an apocalyptic number.

It is an amenable number.

28235916 is an abundant number, since it is smaller than the sum of its proper divisors (45443508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28235916 is a wasteful number, since it uses less digits than its factorization.

28235916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25342 (or 25337 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 28235916 is about 5313.7478299219. The cubic root of 28235916 is about 304.5093463769.

The spelling of 28235916 in words is "twenty-eight million, two hundred thirty-five thousand, nine hundred sixteen".