28523506 has 8 divisors (see below), whose sum is σ = 46674864. Its totient is φ = 12965220.

The previous prime is 28523477. The next prime is 28523507. The reversal of 28523506 is 60532582.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (28523507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 648240 + ... + 648283.

It is an arithmetic number, because the mean of its divisors is an integer number (5834358).

Almost surely, 2^28523506 is an apocalyptic number.

28523506 is a deficient number, since it is larger than the sum of its proper divisors (18151358).

28523506 is a wasteful number, since it uses less digits than its factorization.

28523506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296536.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 28523506 is about 5340.7402108697. The cubic root of 28523506 is about 305.5396912437.

The spelling of 28523506 in words is "twenty-eight million, five hundred twenty-three thousand, five hundred six".