28513398 has 16 divisors (see below), whose sum is σ = 57391920. Its totient is φ = 9443616.

The previous prime is 28513393. The next prime is 28513423. The reversal of 28513398 is 89331582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28513393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14193 + ... + 16076.

It is an arithmetic number, because the mean of its divisors is an integer number (3586995).

Almost surely, 2^28513398 is an apocalyptic number.

28513398 is an abundant number, since it is smaller than the sum of its proper divisors (28878522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28513398 is a wasteful number, since it uses less digits than its factorization.

28513398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30431.

The product of its digits is 51840, while the sum is 39.

The square root of 28513398 is about 5339.7938162442. The cubic root of 28513398 is about 305.5035951657.

The spelling of 28513398 in words is "twenty-eight million, five hundred thirteen thousand, three hundred ninety-eight".