28015542 has 24 divisors (see below), whose sum is σ = 61042800. Its totient is φ = 9285840.

The previous prime is 28015523. The next prime is 28015553. The reversal of 28015542 is 24551082.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1042 + ... + 7557.

It is an arithmetic number, because the mean of its divisors is an integer number (2543450).

Almost surely, 2^28015542 is an apocalyptic number.

28015542 is an abundant number, since it is smaller than the sum of its proper divisors (33027258).

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

28015542 is a wasteful number, since it uses less digits than its factorization.

28015542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8788 (or 8785 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 28015542 is about 5292.9709993538. The cubic root of 28015542 is about 303.7150709213.

The spelling of 28015542 in words is "twenty-eight million, fifteen thousand, five hundred forty-two".