28423898 has 8 divisors (see below), whose sum is σ = 45143892. Its totient is φ = 13375936.

The previous prime is 28423897. The next prime is 28423909. The reversal of 28423898 is 89832482.

It can be written as a sum of positive squares in 2 ways, for example, as 27804529 + 619369 = 5273^2 + 787^2 .

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 (28423891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 417965 + ... + 418032.

Almost surely, 2^28423898 is an apocalyptic number.

28423898 is a deficient number, since it is larger than the sum of its proper divisors (16719994).

28423898 is a wasteful number, since it uses less digits than its factorization.

28423898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836016.

The product of its digits is 221184, while the sum is 44.

The square root of 28423898 is about 5331.4067561948. The cubic root of 28423898 is about 305.1836142446.

The spelling of 28423898 in words is "twenty-eight million, four hundred twenty-three thousand, eight hundred ninety-eight".