28572404 has 24 divisors (see below), whose sum is σ = 57872640. Its totient is φ = 12089376.

The previous prime is 28572403. The next prime is 28572407. The reversal of 28572404 is 40427582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28572403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4247 + ... + 8670.

It is an arithmetic number, because the mean of its divisors is an integer number (2411360).

Almost surely, 2^28572404 is an apocalyptic number.

It is an amenable number.

28572404 is an abundant number, since it is smaller than the sum of its proper divisors (29300236).

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

28572404 is a wasteful number, since it uses less digits than its factorization.

28572404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13007 (or 13005 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 28572404 is about 5345.3160804577. The cubic root of 28572404 is about 305.7141876812.

Adding to 28572404 its reverse (40427582), we get a palindrome (68999986).

The spelling of 28572404 in words is "twenty-eight million, five hundred seventy-two thousand, four hundred four".