28930572 has 72 divisors (see below), whose sum is σ = 81681600. Its totient is φ = 8557920.

The previous prime is 28930571. The next prime is 28930613. The reversal of 28930572 is 27503982.

It is a happy number.

28930572 is a `hidden beast` number, since 2 + 89 + 3 + 0 + 572 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (28930571) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16179 + ... + 17877.

Almost surely, 2^28930572 is an apocalyptic number.

28930572 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28930572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40840800).

28930572 is an abundant number, since it is smaller than the sum of its proper divisors (52751028).

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

28930572 is a wasteful number, since it uses less digits than its factorization.

28930572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1763 (or 1758 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 28930572 is about 5378.7147163611. The cubic root of 28930572 is about 306.9863087048.

The spelling of 28930572 in words is "twenty-eight million, nine hundred thirty thousand, five hundred seventy-two".