28423538 has 64 divisors (see below), whose sum is σ = 54432000. Its totient is φ = 10940160.

The previous prime is 28423531. The next prime is 28423547. The reversal of 28423538 is 83532482.

It is a junction number, because it is equal to n+sod(n) for n = 28423498 and 28423507.

It is not an unprimeable number, because it can be changed into a prime (28423531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 190688 + ... + 190836.

It is an arithmetic number, because the mean of its divisors is an integer number (850500).

Almost surely, 2^28423538 is an apocalyptic number.

28423538 is a deficient number, since it is larger than the sum of its proper divisors (26008462).

28423538 is a wasteful number, since it uses less digits than its factorization.

28423538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227.

The product of its digits is 46080, while the sum is 35.

The square root of 28423538 is about 5331.3729938919. The cubic root of 28423538 is about 305.1823258152.

The spelling of 28423538 in words is "twenty-eight million, four hundred twenty-three thousand, five hundred thirty-eight".