28331542 has 8 divisors (see below), whose sum is σ = 42549696. Its totient is φ = 14148312.

The previous prime is 28331507. The next prime is 28331543. The reversal of 28331542 is 24513382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 28331542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28331543) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6598 + ... + 10009.

It is an arithmetic number, because the mean of its divisors is an integer number (5318712).

Almost surely, 2^28331542 is an apocalyptic number.

28331542 is a deficient number, since it is larger than the sum of its proper divisors (14218154).

28331542 is a wasteful number, since it uses less digits than its factorization.

28331542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17462.

The product of its digits is 5760, while the sum is 28.

The square root of 28331542 is about 5322.7382050971. The cubic root of 28331542 is about 304.8527175666.

The spelling of 28331542 in words is "twenty-eight million, three hundred thirty-one thousand, five hundred forty-two".