28038072 has 32 divisors (see below), whose sum is σ = 73785600. Its totient is φ = 8853984.

The previous prime is 28038067. The next prime is 28038079. The reversal of 28038072 is 27083082.

It is a super-2 number, since 2×28038072² = 1572266962954368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28038079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30288 + ... + 31199.

It is an arithmetic number, because the mean of its divisors is an integer number (2305800).

Almost surely, 2^28038072 is an apocalyptic number.

It is an amenable number.

28038072 is an abundant number, since it is smaller than the sum of its proper divisors (45747528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28038072 is a wasteful number, since it uses less digits than its factorization.

28038072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61515 (or 61511 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 28038072 is about 5295.0988659325. The cubic root of 28038072 is about 303.7964646357.

The spelling of 28038072 in words is "twenty-eight million, thirty-eight thousand, seventy-two".