28824040 has 64 divisors (see below), whose sum is σ = 74856960. Its totient is φ = 9784320.

The previous prime is 28824031. The next prime is 28824043. The reversal of 28824040 is 4042882.

28824040 = 448² + 449² + ... + 560².

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (28824043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31185 + ... + 32095.

It is an arithmetic number, because the mean of its divisors is an integer number (1169640).

Almost surely, 2^28824040 is an apocalyptic number.

28824040 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 28824040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37428480).

28824040 is an abundant number, since it is smaller than the sum of its proper divisors (46032920).

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

28824040 is a wasteful number, since it uses less digits than its factorization.

28824040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042 (or 1038 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

The square root of 28824040 is about 5368.8024735503. The cubic root of 28824040 is about 306.6090366396.

The spelling of 28824040 in words is "twenty-eight million, eight hundred twenty-four thousand, forty".