28447634 has 4 divisors (see below), whose sum is σ = 42671454. Its totient is φ = 14223816.

The previous prime is 28447609. The next prime is 28447649. The reversal of 28447634 is 43674482.

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., 16785409 + 11662225 = 4097^2 + 3415^2 .

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 as a sum of consecutive naturals, namely, 7111907 + ... + 7111910.

Almost surely, 2^28447634 is an apocalyptic number.

28447634 is a deficient number, since it is larger than the sum of its proper divisors (14223820).

28447634 is a wasteful number, since it uses less digits than its factorization.

28447634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14223819.

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

The square root of 28447634 is about 5333.6323457846. The cubic root of 28447634 is about 305.2685407013.

The spelling of 28447634 in words is "twenty-eight million, four hundred forty-seven thousand, six hundred thirty-four".