406885240 has 64 divisors (see below), whose sum is σ = 948866400. Its totient is φ = 156928512.

The previous prime is 406885223. The next prime is 406885243. The reversal of 406885240 is 42588604.

It is a self number, because there is not a number n which added to its sum of digits gives 406885240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406885243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123454 + ... + 126706.

Almost surely, 2^406885240 is an apocalyptic number.

406885240 is a gapful number since it is divisible by the number (40) 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 406885240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (474433200).

406885240 is an abundant number, since it is smaller than the sum of its proper divisors (541981160).

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

406885240 is a wasteful number, since it uses less digits than its factorization.

406885240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3376 (or 3372 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 37.

The square root of 406885240 is about 20171.3965803065. The cubic root of 406885240 is about 741.0098460182.

The spelling of 406885240 in words is "four hundred six million, eight hundred eighty-five thousand, two hundred forty".