28782972 has 96 divisors (see below), whose sum is σ = 80619840. Its totient is φ = 8847360.

The previous prime is 28782961. The next prime is 28782979. The reversal of 28782972 is 27928782.

It is a happy number.

28782972 is nontrivially palindromic in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28782979) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 111868 + ... + 112124.

It is an arithmetic number, because the mean of its divisors is an integer number (839790).

Almost surely, 2^28782972 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 28782972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40309920).

28782972 is an abundant number, since it is smaller than the sum of its proper divisors (51836868).

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

28782972 is a wasteful number, since it uses less digits than its factorization.

28782972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348 (or 340 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 28782972 is about 5364.9764211970. The cubic root of 28782972 is about 306.4633503206.

The spelling of 28782972 in words is "twenty-eight million, seven hundred eighty-two thousand, nine hundred seventy-two".