28402198 has 8 divisors (see below), whose sum is σ = 46476360. Its totient is φ = 12910080.

The previous prime is 28402177. The next prime is 28402219. The reversal of 28402198 is 89120482.

It is an interprime number because it is at equal distance from previous prime (28402177) and next prime (28402219).

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

It is a congruent number.

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, 645483 + ... + 645526.

It is an arithmetic number, because the mean of its divisors is an integer number (5809545).

Almost surely, 2^28402198 is an apocalyptic number.

28402198 is a deficient number, since it is larger than the sum of its proper divisors (18074162).

28402198 is a wasteful number, since it uses less digits than its factorization.

28402198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291022.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 28402198 is about 5329.3712574749. The cubic root of 28402198 is about 305.1059311340.

The spelling of 28402198 in words is "twenty-eight million, four hundred two thousand, one hundred ninety-eight".