28430858 has 8 divisors (see below), whose sum is σ = 42691428. Its totient is φ = 14200384.

The previous prime is 28430833. The next prime is 28430873. The reversal of 28430858 is 85803482.

It can be written as a sum of positive squares in 2 ways, for example, as 19651489 + 8779369 = 4433^2 + 2963^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4991 + ... + 9042.

Almost surely, 2^28430858 is an apocalyptic number.

28430858 is a deficient number, since it is larger than the sum of its proper divisors (14260570).

28430858 is a wasteful number, since it uses less digits than its factorization.

28430858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15048.

The product of its (nonzero) digits is 61440, while the sum is 38.

The square root of 28430858 is about 5332.0594520316. The cubic root of 28430858 is about 305.2085217434.

The spelling of 28430858 in words is "twenty-eight million, four hundred thirty thousand, eight hundred fifty-eight".