28530042 has 16 divisors (see below), whose sum is σ = 57510912. Its totient is φ = 9434880.

The previous prime is 28530037. The next prime is 28530043. The reversal of 28530042 is 24003582.

It is a junction number, because it is equal to n+sod(n) for n = 28529994 and 28530021.

It is not an unprimeable number, because it can be changed into a prime (28530043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17959 + ... + 19482.

It is an arithmetic number, because the mean of its divisors is an integer number (3594432).

Almost surely, 2^28530042 is an apocalyptic number.

28530042 is an abundant number, since it is smaller than the sum of its proper divisors (28980870).

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

28530042 is a wasteful number, since it uses less digits than its factorization.

28530042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37573.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 28530042 is about 5341.3520760197. The cubic root of 28530042 is about 305.5630270251.

The spelling of 28530042 in words is "twenty-eight million, five hundred thirty thousand, forty-two".