28515822 has 16 divisors (see below), whose sum is σ = 57169152. Its totient is φ = 9482360.

The previous prime is 28515811. The next prime is 28515829. The reversal of 28515822 is 22851582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28515829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2928 + ... + 8099.

It is an arithmetic number, because the mean of its divisors is an integer number (3573072).

Almost surely, 2^28515822 is an apocalyptic number.

28515822 is an abundant number, since it is smaller than the sum of its proper divisors (28653330).

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

28515822 is a wasteful number, since it uses less digits than its factorization.

28515822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11463.

The product of its digits is 12800, while the sum is 33.

The square root of 28515822 is about 5340.0207864764. The cubic root of 28515822 is about 305.5122521455.

The spelling of 28515822 in words is "twenty-eight million, five hundred fifteen thousand, eight hundred twenty-two".