28397052 has 36 divisors (see below), whose sum is σ = 72596160. Its totient is φ = 9358272.

The previous prime is 28397027. The next prime is 28397053. The reversal of 28397052 is 25079382.

It is a happy number.

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 a junction number, because it is equal to n+sod(n) for n = 28396998 and 28397016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28397053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1228 + ... + 7635.

It is an arithmetic number, because the mean of its divisors is an integer number (2016560).

Almost surely, 2^28397052 is an apocalyptic number.

It is an amenable number.

28397052 is an abundant number, since it is smaller than the sum of its proper divisors (44199108).

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

28397052 is a wasteful number, since it uses less digits than its factorization.

28397052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8962 (or 8957 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 28397052 is about 5328.8884394403. Note that the first 3 decimals coincide. The cubic root of 28397052 is about 305.0875033354.

The spelling of 28397052 in words is "twenty-eight million, three hundred ninety-seven thousand, fifty-two".