285333794640 has 200 divisors, whose sum is σ = 1004965999488. Its totient is φ = 75017214720.

The previous prime is 285333794639. The next prime is 285333794719. The reversal of 285333794640 is 46497333582.

285333794640 is a `hidden beast` number, since 2 + 85 + 3 + 33 + 79 + 464 + 0 = 666.

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

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, 149989 + ... + 770171.

Almost surely, 2^285333794640 is an apocalyptic number.

285333794640 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 285333794640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (502482999744).

285333794640 is an abundant number, since it is smaller than the sum of its proper divisors (719632204848).

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

285333794640 is a wasteful number, since it uses less digits than its factorization.

285333794640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620279 (or 620264 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 54.

The spelling of 285333794640 in words is "two hundred eighty-five billion, three hundred thirty-three million, seven hundred ninety-four thousand, six hundred forty".