285442542 has 160 divisors (see below), whose sum is σ = 815443200. Its totient is φ = 73982160.

The previous prime is 285442537. The next prime is 285442543. The reversal of 285442542 is 245244582.

285442542 is a `hidden beast` number, since 28 + 54 + 42 + 542 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 285442497 and 285442506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285442543) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 610993 + ... + 611459.

It is an arithmetic number, because the mean of its divisors is an integer number (5096520).

Almost surely, 2^285442542 is an apocalyptic number.

285442542 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 285442542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (407721600).

285442542 is an abundant number, since it is smaller than the sum of its proper divisors (530000658).

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

285442542 is a wasteful number, since it uses less digits than its factorization.

285442542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513 (or 490 counting only the distinct ones).

The product of its digits is 102400, while the sum is 36.

The square root of 285442542 is about 16895.0448948797. The cubic root of 285442542 is about 658.4248802598.

The spelling of 285442542 in words is "two hundred eighty-five million, four hundred forty-two thousand, five hundred forty-two".