283778964 has 120 divisors (see below), whose sum is σ = 853288128. Its totient is φ = 80559360.

The previous prime is 283778951. The next prime is 283779043. The reversal of 283778964 is 469877382.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 283778964.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 478252 + ... + 478844.

Almost surely, 2^283778964 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 283778964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (426644064).

283778964 is an abundant number, since it is smaller than the sum of its proper divisors (569509164).

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

283778964 is a wasteful number, since it uses less digits than its factorization.

283778964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827 (or 816 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 54.

The square root of 283778964 is about 16845.7402330678. The cubic root of 283778964 is about 657.1432726885.

The spelling of 283778964 in words is "two hundred eighty-three million, seven hundred seventy-eight thousand, nine hundred sixty-four".