28468442 has 4 divisors (see below), whose sum is σ = 42702666. Its totient is φ = 14234220.

The previous prime is 28468423. The next prime is 28468469. The reversal of 28468442 is 24486482.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24486482 = 2 ⋅12243241.

It can be written as a sum of positive squares in only one way, i.e., 27678121 + 790321 = 5261^2 + 889^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28468396 and 28468405.

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, 7117109 + ... + 7117112.

Almost surely, 2^28468442 is an apocalyptic number.

28468442 is a deficient number, since it is larger than the sum of its proper divisors (14234224).

28468442 is a wasteful number, since it uses less digits than its factorization.

28468442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14234223.

The product of its digits is 98304, while the sum is 38.

The square root of 28468442 is about 5335.5826298540. The cubic root of 28468442 is about 305.3429520413.

The spelling of 28468442 in words is "twenty-eight million, four hundred sixty-eight thousand, four hundred forty-two".