28542642 has 16 divisors (see below), whose sum is σ = 58478112. Its totient is φ = 9282080.

The previous prime is 28542629. The next prime is 28542649. The reversal of 28542642 is 24624582.

It is not an unprimeable number, because it can be changed into a prime (28542649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57768 + ... + 58259.

It is an arithmetic number, because the mean of its divisors is an integer number (3654882).

Almost surely, 2^28542642 is an apocalyptic number.

28542642 is an abundant number, since it is smaller than the sum of its proper divisors (29935470).

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

28542642 is a wasteful number, since it uses less digits than its factorization.

28542642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116073.

The product of its digits is 30720, while the sum is 33.

The square root of 28542642 is about 5342.5314224626. The cubic root of 28542642 is about 305.6080033288.

The spelling of 28542642 in words is "twenty-eight million, five hundred forty-two thousand, six hundred forty-two".