28976840 has 64 divisors (see below), whose sum is σ = 70709760. Its totient is φ = 10644480.

The previous prime is 28976813. The next prime is 28976851. The reversal of 28976840 is 4867982.

It is a junction number, because it is equal to n+sod(n) for n = 28976791 and 28976800.

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, 28745 + ... + 29735.

It is an arithmetic number, because the mean of its divisors is an integer number (1104840).

Almost surely, 2^28976840 is an apocalyptic number.

28976840 is a gapful number since it is divisible by the number (20) 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 28976840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35354880).

28976840 is an abundant number, since it is smaller than the sum of its proper divisors (41732920).

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

28976840 is a wasteful number, since it uses less digits than its factorization.

28976840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062 (or 1058 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 28976840 is about 5383.0140256180. The cubic root of 28976840 is about 307.1498735939.

The spelling of 28976840 in words is "twenty-eight million, nine hundred seventy-six thousand, eight hundred forty".