28419434 has 4 divisors (see below), whose sum is σ = 42629154. Its totient is φ = 14209716.

The previous prime is 28419409. The next prime is 28419439. The reversal of 28419434 is 43491482.

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

It can be written as a sum of positive squares in only one way, i.e., 14707225 + 13712209 = 3835^2 + 3703^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28419394 and 28419403.

It is not an unprimeable number, because it can be changed into a prime (28419439) by changing a digit.

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, 7104857 + ... + 7104860.

Almost surely, 2^28419434 is an apocalyptic number.

28419434 is a deficient number, since it is larger than the sum of its proper divisors (14209720).

28419434 is a wasteful number, since it uses less digits than its factorization.

28419434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14209719.

The product of its digits is 27648, while the sum is 35.

The square root of 28419434 is about 5330.9880885254. The cubic root of 28419434 is about 305.1676369500.

The spelling of 28419434 in words is "twenty-eight million, four hundred nineteen thousand, four hundred thirty-four".