28133496 has 24 divisors (see below), whose sum is σ = 76195080. Its totient is φ = 9377808.

The previous prime is 28133491. The next prime is 28133507. The reversal of 28133496 is 69433182.

It is a tau number, because it is divible by the number of its divisors (24).

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

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 28133496.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28133491) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 195300 + ... + 195443.

It is an arithmetic number, because the mean of its divisors is an integer number (3174795).

Almost surely, 2^28133496 is an apocalyptic number.

It is an amenable number.

28133496 is an abundant number, since it is smaller than the sum of its proper divisors (48061584).

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

28133496 is a wasteful number, since it uses less digits than its factorization.

28133496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390755 (or 390748 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 28133496 is about 5304.1018089777. The cubic root of 28133496 is about 304.1407185554.

The spelling of 28133496 in words is "twenty-eight million, one hundred thirty-three thousand, four hundred ninety-six".