28430194 has 36 divisors (see below), whose sum is σ = 48945546. Its totient is φ = 12377664.

The previous prime is 28430189. The next prime is 28430197. The reversal of 28430194 is 49103482.

It can be written as a sum of positive squares in 3 ways, for example, as 9828225 + 18601969 = 3135^2 + 4313^2 .

It is not an unprimeable number, because it can be changed into a prime (28430197) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 121902 + ... + 122134.

Almost surely, 2^28430194 is an apocalyptic number.

28430194 is a deficient number, since it is larger than the sum of its proper divisors (20515352).

28430194 is a wasteful number, since it uses less digits than its factorization.

28430194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299 (or 267 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 28430194 is about 5331.9971867960. The cubic root of 28430194 is about 305.2061456861.

The spelling of 28430194 in words is "twenty-eight million, four hundred thirty thousand, one hundred ninety-four".