28423198 has 4 divisors (see below), whose sum is σ = 42634800. Its totient is φ = 14211598.

The previous prime is 28423189. The next prime is 28423243. The reversal of 28423198 is 89132482.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 7105798 + ... + 7105801.

It is an arithmetic number, because the mean of its divisors is an integer number (10658700).

Almost surely, 2^28423198 is an apocalyptic number.

28423198 is a deficient number, since it is larger than the sum of its proper divisors (14211602).

28423198 is a wasteful number, since it uses less digits than its factorization.

28423198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14211601.

The product of its digits is 27648, while the sum is 37.

The square root of 28423198 is about 5331.3411070762. The cubic root of 28423198 is about 305.1811089551.

It can be divided in two parts, 2842 and 3198, that multiplied together give a triangular number (9088716 = T₄₂₆₃).

The spelling of 28423198 in words is "twenty-eight million, four hundred twenty-three thousand, one hundred ninety-eight".