283087840 has 192 divisors, whose sum is σ = 823011840. Its totient is φ = 89856000.

The previous prime is 283087837. The next prime is 283087853. The reversal of 283087840 is 48780382.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 283087793 and 283087802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1127715 + ... + 1127965.

It is an arithmetic number, because the mean of its divisors is an integer number (4286520).

Almost surely, 2^283087840 is an apocalyptic number.

283087840 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 283087840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (411505920).

283087840 is an abundant number, since it is smaller than the sum of its proper divisors (539924000).

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

283087840 is a wasteful number, since it uses less digits than its factorization.

283087840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345 (or 337 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 283087840 is about 16825.2144117096. The cubic root of 283087840 is about 656.6093633878.

The spelling of 283087840 in words is "two hundred eighty-three million, eighty-seven thousand, eight hundred forty".