28523746 has 4 divisors (see below), whose sum is σ = 42785622. Its totient is φ = 14261872.

The previous prime is 28523743. The next prime is 28523771. The reversal of 28523746 is 64732582.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17732521 + 10791225 = 4211^2 + 3285^2 .

It is not an unprimeable number, because it can be changed into a prime (28523743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7130935 + ... + 7130938.

Almost surely, 2^28523746 is an apocalyptic number.

28523746 is a deficient number, since it is larger than the sum of its proper divisors (14261876).

28523746 is a wasteful number, since it uses less digits than its factorization.

28523746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14261875.

The product of its digits is 80640, while the sum is 37.

The square root of 28523746 is about 5340.7626796180. The cubic root of 28523746 is about 305.5405481898.

The spelling of 28523746 in words is "twenty-eight million, five hundred twenty-three thousand, seven hundred forty-six".