400420552 has 96 divisors (see below), whose sum is σ = 914699520. Its totient is φ = 163658880.

The previous prime is 400420543. The next prime is 400420561. The reversal of 400420552 is 255024004.

It is an interprime number because it is at equal distance from previous prime (400420543) and next prime (400420561).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1008418 + ... + 1008814.

It is an arithmetic number, because the mean of its divisors is an integer number (9528120).

Almost surely, 2^400420552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400420552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (457349760).

400420552 is an abundant number, since it is smaller than the sum of its proper divisors (514278968).

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

400420552 is a wasteful number, since it uses less digits than its factorization.

400420552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531 (or 520 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 400420552 is about 20010.5110379520. The cubic root of 400420552 is about 737.0644304205.

Adding to 400420552 its reverse (255024004), we get a palindrome (655444556).

The spelling of 400420552 in words is "four hundred million, four hundred twenty thousand, five hundred fifty-two".