28521374 has 16 divisors (see below), whose sum is σ = 48964608. Its totient is φ = 12205752.

The previous prime is 28521371. The next prime is 28521379. The reversal of 28521374 is 47312582.

It is a self number, because there is not a number n which added to its sum of digits gives 28521374.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28521371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14519 + ... + 16365.

It is an arithmetic number, because the mean of its divisors is an integer number (3060288).

Almost surely, 2^28521374 is an apocalyptic number.

28521374 is a deficient number, since it is larger than the sum of its proper divisors (20443234).

28521374 is a wasteful number, since it uses less digits than its factorization.

28521374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2959.

The product of its digits is 13440, while the sum is 32.

The square root of 28521374 is about 5340.5406093391. The cubic root of 28521374 is about 305.5320784950.

The spelling of 28521374 in words is "twenty-eight million, five hundred twenty-one thousand, three hundred seventy-four".