28491942 has 32 divisors (see below), whose sum is σ = 58060800. Its totient is φ = 9319968.

The previous prime is 28491937. The next prime is 28491959. The reversal of 28491942 is 24919482.

It is a self number, because there is not a number n which added to its sum of digits gives 28491942.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105784 + ... + 106052.

It is an arithmetic number, because the mean of its divisors is an integer number (1814400).

Almost surely, 2^28491942 is an apocalyptic number.

28491942 is an abundant number, since it is smaller than the sum of its proper divisors (29568858).

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

28491942 is a wasteful number, since it uses less digits than its factorization.

28491942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540.

The product of its digits is 41472, while the sum is 39.

The square root of 28491942 is about 5337.7843718157. The cubic root of 28491942 is about 305.4269466374.

The spelling of 28491942 in words is "twenty-eight million, four hundred ninety-one thousand, nine hundred forty-two".