283223640 has 128 divisors (see below), whose sum is σ = 976642560. Its totient is φ = 64364544.

The previous prime is 283223623. The next prime is 283223683. The reversal of 283223640 is 46322382.

283223640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 283223598 and 283223607.

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, 161247 + ... + 162993.

It is an arithmetic number, because the mean of its divisors is an integer number (7630020).

Almost surely, 2^283223640 is an apocalyptic number.

283223640 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 283223640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (488321280).

283223640 is an abundant number, since it is smaller than the sum of its proper divisors (693418920).

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

283223640 is a wasteful number, since it uses less digits than its factorization.

283223640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1961 (or 1957 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 283223640 is about 16829.2495376354. The cubic root of 283223640 is about 656.7143405770.

The spelling of 283223640 in words is "two hundred eighty-three million, two hundred twenty-three thousand, six hundred forty".