28914724 has 6 divisors (see below), whose sum is σ = 50600774. Its totient is φ = 14457360.

The previous prime is 28914719. The next prime is 28914727. The reversal of 28914724 is 42741982.

It can be written as a sum of positive squares in only one way, i.e., 27878400 + 1036324 = 5280^2 + 1018^2 .

It is a super-2 number, since 2×28914724² = 1672122527992352, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28914727) by changing a digit.

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, 3614337 + ... + 3614344.

Almost surely, 2^28914724 is an apocalyptic number.

It is an amenable number.

28914724 is a deficient number, since it is larger than the sum of its proper divisors (21686050).

28914724 is a wasteful number, since it uses less digits than its factorization.

28914724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7228685 (or 7228683 counting only the distinct ones).

The product of its digits is 32256, while the sum is 37.

The square root of 28914724 is about 5377.2413001464. The cubic root of 28914724 is about 306.9302433581.

The spelling of 28914724 in words is "twenty-eight million, nine hundred fourteen thousand, seven hundred twenty-four".