28071512 has 48 divisors (see below), whose sum is σ = 64467000. Its totient is φ = 11394432.

The previous prime is 28071497. The next prime is 28071541. The reversal of 28071512 is 21517082.

It is a super-2 number, since 2×28071512² = 1576019571932288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5564 + ... + 9332.

Almost surely, 2^28071512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28071512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32233500).

28071512 is an abundant number, since it is smaller than the sum of its proper divisors (36395488).

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

28071512 is a wasteful number, since it uses less digits than its factorization.

28071512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3808 (or 3797 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 28071512 is about 5298.2555619751. The cubic root of 28071512 is about 303.9171923581.

Adding to 28071512 its reverse (21517082), we get a palindrome (49588594).

The spelling of 28071512 in words is "twenty-eight million, seventy-one thousand, five hundred twelve".