28471724 has 6 divisors (see below), whose sum is σ = 49825524. Its totient is φ = 14235860.

The previous prime is 28471693. The next prime is 28471727. The reversal of 28471724 is 42717482.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28471727) 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, 3558962 + ... + 3558969.

It is an arithmetic number, because the mean of its divisors is an integer number (8304254).

Almost surely, 2^28471724 is an apocalyptic number.

It is an amenable number.

28471724 is a deficient number, since it is larger than the sum of its proper divisors (21353800).

28471724 is a wasteful number, since it uses less digits than its factorization.

28471724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7117935 (or 7117933 counting only the distinct ones).

The product of its digits is 25088, while the sum is 35.

The square root of 28471724 is about 5335.8901787799. The cubic root of 28471724 is about 305.3546854672.

The spelling of 28471724 in words is "twenty-eight million, four hundred seventy-one thousand, seven hundred twenty-four".