28523158 has 4 divisors (see below), whose sum is σ = 42784740. Its totient is φ = 14261578.

The previous prime is 28523119. The next prime is 28523177. The reversal of 28523158 is 85132582.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7130788 + ... + 7130791.

It is an arithmetic number, because the mean of its divisors is an integer number (10696185).

Almost surely, 2^28523158 is an apocalyptic number.

28523158 is a deficient number, since it is larger than the sum of its proper divisors (14261582).

28523158 is a wasteful number, since it uses less digits than its factorization.

28523158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14261581.

The product of its digits is 19200, while the sum is 34.

The square root of 28523158 is about 5340.7076310167. The cubic root of 28523158 is about 305.5384486633.

The spelling of 28523158 in words is "twenty-eight million, five hundred twenty-three thousand, one hundred fifty-eight".