285949440 has 400 divisors, whose sum is σ = 1176433632. Its totient is φ = 65028096.

The previous prime is 285949439. The next prime is 285949453. The reversal of 285949440 is 44949582.

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 polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1451422 + ... + 1451618.

Almost surely, 2^285949440 is an apocalyptic number.

285949440 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 285949440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (588216816).

285949440 is an abundant number, since it is smaller than the sum of its proper divisors (890484192).

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

285949440 is an equidigital number, since it uses as much as digits as its factorization.

285949440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 285949440 is about 16910.0396214793. The cubic root of 285949440 is about 658.8144004337.

The spelling of 285949440 in words is "two hundred eighty-five million, nine hundred forty-nine thousand, four hundred forty".