28700442 has 24 divisors (see below), whose sum is σ = 62637120. Its totient is φ = 9497160.

The previous prime is 28700411. The next prime is 28700443. The reversal of 28700442 is 24400782.

It is not an unprimeable number, because it can be changed into a prime (28700443) 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, 3234 + ... + 8237.

It is an arithmetic number, because the mean of its divisors is an integer number (2609880).

Almost surely, 2^28700442 is an apocalyptic number.

28700442 is an abundant number, since it is smaller than the sum of its proper divisors (33936678).

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

28700442 is a wasteful number, since it uses less digits than its factorization.

28700442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11618 (or 11615 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 28700442 is about 5357.2793468327. The cubic root of 28700442 is about 306.1701603898.

The spelling of 28700442 in words is "twenty-eight million, seven hundred thousand, four hundred forty-two".