28072248 has 16 divisors (see below), whose sum is σ = 70180680. Its totient is φ = 9357408.

The previous prime is 28072241. The next prime is 28072271. The reversal of 28072248 is 84227082.

It is a super-2 number, since 2×28072248² = 1576102215547008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28072241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 584815 + ... + 584862.

Almost surely, 2^28072248 is an apocalyptic number.

It is an amenable number.

28072248 is an abundant number, since it is smaller than the sum of its proper divisors (42108432).

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

28072248 is a wasteful number, since it uses less digits than its factorization.

28072248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169686 (or 1169682 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 33.

The square root of 28072248 is about 5298.3250183431. The cubic root of 28072248 is about 303.9198484446.

It can be divided in two parts, 2807 and 2248, that multiplied together give a palindrome (6310136).

The spelling of 28072248 in words is "twenty-eight million, seventy-two thousand, two hundred forty-eight".