28521134 has 8 divisors (see below), whose sum is σ = 42813120. Its totient is φ = 14250096.

The previous prime is 28521107. The next prime is 28521137. The reversal of 28521134 is 43112582.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28521137) 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, 1214 + ... + 7649.

It is an arithmetic number, because the mean of its divisors is an integer number (5351640).

Almost surely, 2^28521134 is an apocalyptic number.

28521134 is a deficient number, since it is larger than the sum of its proper divisors (14291986).

28521134 is a wasteful number, since it uses less digits than its factorization.

28521134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10474.

The product of its digits is 1920, while the sum is 26.

The square root of 28521134 is about 5340.5181396565. The cubic root of 28521134 is about 305.5312215014.

The spelling of 28521134 in words is "twenty-eight million, five hundred twenty-one thousand, one hundred thirty-four".