28570542 has 128 divisors (see below), whose sum is σ = 78962688. Its totient is φ = 6652800.

The previous prime is 28570519. The next prime is 28570543. The reversal of 28570542 is 24507582.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28570543) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 402367 + ... + 402437.

It is an arithmetic number, because the mean of its divisors is an integer number (616896).

Almost surely, 2^28570542 is an apocalyptic number.

28570542 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 28570542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39481344).

28570542 is an abundant number, since it is smaller than the sum of its proper divisors (50392146).

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

28570542 is a wasteful number, since it uses less digits than its factorization.

28570542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174.

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 28570542 is about 5345.1419064418. The cubic root of 28570542 is about 305.7075466324.

The spelling of 28570542 in words is "twenty-eight million, five hundred seventy thousand, five hundred forty-two".