28024072 has 8 divisors (see below), whose sum is σ = 52545150. Its totient is φ = 14012032.

The previous prime is 28024057. The next prime is 28024091. The reversal of 28024072 is 27042082.

It can be written as a sum of positive squares in only one way, i.e., 24542116 + 3481956 = 4954^2 + 1866^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×28024072² = 1570697222922368, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1751497 + ... + 1751512.

Almost surely, 2^28024072 is an apocalyptic number.

It is an amenable number.

28024072 is a deficient number, since it is larger than the sum of its proper divisors (24521078).

28024072 is a wasteful number, since it uses less digits than its factorization.

28024072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3503015 (or 3503011 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 28024072 is about 5293.7767236634. The cubic root of 28024072 is about 303.7458922260.

The spelling of 28024072 in words is "twenty-eight million, twenty-four thousand, seventy-two".