285363990 has 96 divisors (see below), whose sum is σ = 799358976. Its totient is φ = 70424640.

The previous prime is 285363961. The next prime is 285364007. The reversal of 285363990 is 99363582.

285363990 is a `hidden beast` number, since 2 + 8 + 5 + 3 + 639 + 9 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 61947 + ... + 66393.

It is an arithmetic number, because the mean of its divisors is an integer number (8326656).

Almost surely, 2^285363990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285363990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (399679488).

285363990 is an abundant number, since it is smaller than the sum of its proper divisors (513994986).

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

285363990 is a wasteful number, since it uses less digits than its factorization.

285363990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4514 (or 4511 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The square root of 285363990 is about 16892.7200296459. The cubic root of 285363990 is about 658.3644765840.

The spelling of 285363990 in words is "two hundred eighty-five million, three hundred sixty-three thousand, nine hundred ninety".