28458404 has 24 divisors (see below), whose sum is σ = 54007800. Its totient is φ = 13042944.

The previous prime is 28458401. The next prime is 28458413. The reversal of 28458404 is 40485482.

It can be written as a sum of positive squares in 4 ways, for example, as 2244004 + 26214400 = 1498^2 + 5120^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28458401) 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, 5912 + ... + 9584.

It is an arithmetic number, because the mean of its divisors is an integer number (2250325).

Almost surely, 2^28458404 is an apocalyptic number.

It is an amenable number.

28458404 is a deficient number, since it is larger than the sum of its proper divisors (25549396).

28458404 is a wasteful number, since it uses less digits than its factorization.

28458404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3839 (or 3837 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 35.

The square root of 28458404 is about 5334.6418811388. The cubic root of 28458404 is about 305.3070597497.

The spelling of 28458404 in words is "twenty-eight million, four hundred fifty-eight thousand, four hundred four".