285091380 has 192 divisors, whose sum is σ = 1021440000. Its totient is φ = 64665216.

The previous prime is 285091379. The next prime is 285091393. The reversal of 285091380 is 83190582.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 752031 + ... + 752409.

It is an arithmetic number, because the mean of its divisors is an integer number (5320000).

Almost surely, 2^285091380 is an apocalyptic number.

285091380 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 285091380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (510720000).

285091380 is an abundant number, since it is smaller than the sum of its proper divisors (736348620).

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

285091380 is a wasteful number, since it uses less digits than its factorization.

285091380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603 (or 595 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 285091380 is about 16884.6492412487. The cubic root of 285091380 is about 658.1547632257.

The spelling of 285091380 in words is "two hundred eighty-five million, ninety-one thousand, three hundred eighty".