28447436 has 18 divisors (see below), whose sum is σ = 50379252. Its totient is φ = 14054560.

The previous prime is 28447421. The next prime is 28447451. The reversal of 28447436 is 63474482.

It is an interprime number because it is at equal distance from previous prime (28447421) and next prime (28447451).

It is a super-2 number, since 2×28447436² = 1618513229948192, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28447436.

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 5 ways as a sum of consecutive naturals, for example, 121976 + ... + 122208.

Almost surely, 2^28447436 is an apocalyptic number.

It is an amenable number.

28447436 is a deficient number, since it is larger than the sum of its proper divisors (21931816).

28447436 is a wasteful number, since it uses less digits than its factorization.

28447436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601 (or 366 counting only the distinct ones).

The product of its digits is 129024, while the sum is 38.

The square root of 28447436 is about 5333.6137842930. The cubic root of 28447436 is about 305.2678324607.

The spelling of 28447436 in words is "twenty-eight million, four hundred forty-seven thousand, four hundred thirty-six".