285947388 has 96 divisors (see below), whose sum is σ = 762048000. Its totient is φ = 92695680.

The previous prime is 285947281. The next prime is 285947393. The reversal of 285947388 is 883749582.

It is a happy number.

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 31 ways as a sum of consecutive naturals, for example, 682243 + ... + 682661.

It is an arithmetic number, because the mean of its divisors is an integer number (7938000).

Almost surely, 2^285947388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285947388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (381024000).

285947388 is an abundant number, since it is smaller than the sum of its proper divisors (476100612).

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

285947388 is a wasteful number, since it uses less digits than its factorization.

285947388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592 (or 584 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 54.

The square root of 285947388 is about 16909.9789473553. The cubic root of 285947388 is about 658.8128245253.

The spelling of 285947388 in words is "two hundred eighty-five million, nine hundred forty-seven thousand, three hundred eighty-eight".