285465040 has 80 divisors (see below), whose sum is σ = 769022208. Its totient is φ = 96519168.

The previous prime is 285465023. The next prime is 285465043. The reversal of 285465040 is 40564582.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 285464987 and 285465005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285465043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37389 + ... + 44371.

Almost surely, 2^285465040 is an apocalyptic number.

285465040 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 285465040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (384511104).

285465040 is an abundant number, since it is smaller than the sum of its proper divisors (483557168).

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

285465040 is a wasteful number, since it uses less digits than its factorization.

285465040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7076 (or 7070 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 34.

The square root of 285465040 is about 16895.7106982808. The cubic root of 285465040 is about 658.4421783749.

The spelling of 285465040 in words is "two hundred eighty-five million, four hundred sixty-five thousand, forty".