28378574 has 16 divisors (see below), whose sum is σ = 48934368. Its totient is φ = 12090912.

The previous prime is 28378541. The next prime is 28378577. The reversal of 28378574 is 47587382.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28378577) 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, 3437 + ... + 8280.

It is an arithmetic number, because the mean of its divisors is an integer number (3058398).

Almost surely, 2^28378574 is an apocalyptic number.

28378574 is a deficient number, since it is larger than the sum of its proper divisors (20555794).

28378574 is a wasteful number, since it uses less digits than its factorization.

28378574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11899.

The product of its digits is 376320, while the sum is 44.

The square root of 28378574 is about 5327.1543998649. The cubic root of 28378574 is about 305.0213153606.

It can be divided in two parts, 2837 and 8574, that added together give a palindrome (11411).

The spelling of 28378574 in words is "twenty-eight million, three hundred seventy-eight thousand, five hundred seventy-four".