285730651242 has 96 divisors (see below), whose sum is σ = 647418410496. Its totient is φ = 90971596800.

The previous prime is 285730651237. The next prime is 285730651259. The reversal of 285730651242 is 242156037582.

285730651242 is a `hidden beast` number, since 2 + 8 + 57 + 306 + 51 + 242 = 666.

It is a super-2 number, since 2×285730651242² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15186613 + ... + 15205415.

It is an arithmetic number, because the mean of its divisors is an integer number (6743941776).

Almost surely, 2^285730651242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285730651242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323709205248).

285730651242 is an abundant number, since it is smaller than the sum of its proper divisors (361687759254).

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

285730651242 is a wasteful number, since it uses less digits than its factorization.

285730651242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19196 (or 19193 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The spelling of 285730651242 in words is "two hundred eighty-five billion, seven hundred thirty million, six hundred fifty-one thousand, two hundred forty-two".