285622740 has 384 divisors, whose sum is σ = 1049932800. Its totient is φ = 63866880.

The previous prime is 285622723. The next prime is 285622741. The reversal of 285622740 is 47226582.

285622740 is a `hidden beast` number, since 28 + 5 + 622 + 7 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 285622695 and 285622704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285622741) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4682310 + ... + 4682370.

It is an arithmetic number, because the mean of its divisors is an integer number (2734200).

Almost surely, 2^285622740 is an apocalyptic number.

285622740 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 285622740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (524966400).

285622740 is an abundant number, since it is smaller than the sum of its proper divisors (764310060).

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

285622740 is a wasteful number, since it uses less digits than its factorization.

285622740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 285622740 is about 16900.3769188737. The cubic root of 285622740 is about 658.5634042134.

The spelling of 285622740 in words is "two hundred eighty-five million, six hundred twenty-two thousand, seven hundred forty".