400206884 has 48 divisors (see below), whose sum is σ = 877879296. Its totient is φ = 155085600.

The previous prime is 400206883. The next prime is 400206893. The reversal of 400206884 is 488602004.

It is a self number, because there is not a number n which added to its sum of digits gives 400206884.

It is not an unprimeable number, because it can be changed into a prime (400206881) 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, 55427 + ... + 62229.

It is an arithmetic number, because the mean of its divisors is an integer number (18289152).

Almost surely, 2^400206884 is an apocalyptic number.

400206884 is a gapful number since it is divisible by the number (44) 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 400206884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (438939648).

400206884 is an abundant number, since it is smaller than the sum of its proper divisors (477672412).

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

400206884 is a wasteful number, since it uses less digits than its factorization.

400206884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7016 (or 7014 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 400206884 is about 20005.1714314074. The cubic root of 400206884 is about 736.9333056964.

Adding to 400206884 its reverse (488602004), we get a palindrome (888808888).

The spelling of 400206884 in words is "four hundred million, two hundred six thousand, eight hundred eighty-four".