28762872 has 64 divisors (see below), whose sum is σ = 75271680. Its totient is φ = 9149952.

The previous prime is 28762837. The next prime is 28762889. The reversal of 28762872 is 27826782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48208 + ... + 48800.

It is an arithmetic number, because the mean of its divisors is an integer number (1176120).

Almost surely, 2^28762872 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 28762872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37635840).

28762872 is an abundant number, since it is smaller than the sum of its proper divisors (46508808).

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

28762872 is a wasteful number, since it uses less digits than its factorization.

28762872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692 (or 688 counting only the distinct ones).

The product of its digits is 150528, while the sum is 42.

The square root of 28762872 is about 5363.1028332487. The cubic root of 28762872 is about 306.3919962369.

The spelling of 28762872 in words is "twenty-eight million, seven hundred sixty-two thousand, eight hundred seventy-two".