400485648 has 80 divisors (see below), whose sum is σ = 1096368320. Its totient is φ = 125618688.

The previous prime is 400485619. The next prime is 400485713. The reversal of 400485648 is 846584004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141786 + ... + 144582.

It is an arithmetic number, because the mean of its divisors is an integer number (13704604).

Almost surely, 2^400485648 is an apocalyptic number.

400485648 is a gapful number since it is divisible by the number (48) 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 400485648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (548184160).

400485648 is an abundant number, since it is smaller than the sum of its proper divisors (695882672).

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

400485648 is a wasteful number, since it uses less digits than its factorization.

400485648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2984 (or 2978 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 39.

The square root of 400485648 is about 20012.1375170170. The cubic root of 400485648 is about 737.1043695513.

The spelling of 400485648 in words is "four hundred million, four hundred eighty-five thousand, six hundred forty-eight".