28483840 has 216 divisors, whose sum is σ = 90361152. Its totient is φ = 8355840.

The previous prime is 28483817. The next prime is 28483849. The reversal of 28483840 is 4838482.

It is a super-2 number, since 2×28483840² = 1622658282291200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28483840.

It is not an unprimeable number, because it can be changed into a prime (28483849) 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, 1675512 + ... + 1675528.

Almost surely, 2^28483840 is an apocalyptic number.

28483840 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 28483840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45180576).

28483840 is an abundant number, since it is smaller than the sum of its proper divisors (61877312).

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

28483840 is a wasteful number, since it uses less digits than its factorization.

28483840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73 (or 42 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 37.

The square root of 28483840 is about 5337.0253887348. The cubic root of 28483840 is about 305.3979933786.

The spelling of 28483840 in words is "twenty-eight million, four hundred eighty-three thousand, eight hundred forty".