28434458 has 8 divisors (see below), whose sum is σ = 45932628. Its totient is φ = 13123584.

The previous prime is 28434457. The next prime is 28434491. The reversal of 28434458 is 85443482.

It can be written as a sum of positive squares in 2 ways, for example, as 28015849 + 418609 = 5293^2 + 647^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28434457) by changing a digit.

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, 546791 + ... + 546842.

Almost surely, 2^28434458 is an apocalyptic number.

28434458 is a deficient number, since it is larger than the sum of its proper divisors (17498170).

28434458 is a wasteful number, since it uses less digits than its factorization.

28434458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093648.

The product of its digits is 122880, while the sum is 38.

The square root of 28434458 is about 5332.3970219780. The cubic root of 28434458 is about 305.2214033373.

The spelling of 28434458 in words is "twenty-eight million, four hundred thirty-four thousand, four hundred fifty-eight".