283987440 has 240 divisors, whose sum is σ = 1086359040. Its totient is φ = 65809920.

The previous prime is 283987423. The next prime is 283987453. The reversal of 283987440 is 44789382.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 181381 + ... + 182939.

It is an arithmetic number, because the mean of its divisors is an integer number (4526496).

Almost surely, 2^283987440 is an apocalyptic number.

283987440 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 283987440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (543179520).

283987440 is an abundant number, since it is smaller than the sum of its proper divisors (802371600).

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

283987440 is a wasteful number, since it uses less digits than its factorization.

283987440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1612 (or 1603 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 283987440 is about 16851.9268927918. The cubic root of 283987440 is about 657.3041550226.

The spelling of 283987440 in words is "two hundred eighty-three million, nine hundred eighty-seven thousand, four hundred forty".