286455920 has 40 divisors (see below), whose sum is σ = 670281504. Its totient is φ = 113847552.

The previous prime is 286455919. The next prime is 286455947. The reversal of 286455920 is 29554682.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1157 + ... + 23963.

Almost surely, 2^286455920 is an apocalyptic number.

286455920 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 286455920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335140752).

286455920 is an abundant number, since it is smaller than the sum of its proper divisors (383825584).

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

286455920 is a wasteful number, since it uses less digits than its factorization.

286455920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22977 (or 22971 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 41.

The square root of 286455920 is about 16925.0087149165. The cubic root of 286455920 is about 659.2031399095.

The spelling of 286455920 in words is "two hundred eighty-six million, four hundred fifty-five thousand, nine hundred twenty".