28017642 has 16 divisors (see below), whose sum is σ = 56097792. Its totient is φ = 9328800.

The previous prime is 28017641. The next prime is 28017643. The reversal of 28017642 is 24671082.

It is an interprime number because it is at equal distance from previous prime (28017641) and next prime (28017643).

It is not an unprimeable number, because it can be changed into a prime (28017641) 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, 4878 + ... + 8934.

It is an arithmetic number, because the mean of its divisors is an integer number (3506112).

Almost surely, 2^28017642 is an apocalyptic number.

28017642 is an abundant number, since it is smaller than the sum of its proper divisors (28080150).

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

28017642 is a wasteful number, since it uses less digits than its factorization.

28017642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5213.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 28017642 is about 5293.1693719359. The cubic root of 28017642 is about 303.7226593962.

The spelling of 28017642 in words is "twenty-eight million, seventeen thousand, six hundred forty-two".