400363398 has 48 divisors (see below), whose sum is σ = 908107200. Its totient is φ = 132190056.

The previous prime is 400363387. The next prime is 400363399. The reversal of 400363398 is 893363004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400363399) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 48153 + ... + 55851.

It is an arithmetic number, because the mean of its divisors is an integer number (18918900).

Almost surely, 2^400363398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400363398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (454053600).

400363398 is an abundant number, since it is smaller than the sum of its proper divisors (507743802).

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

400363398 is a wasteful number, since it uses less digits than its factorization.

400363398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7823 (or 7811 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 400363398 is about 20009.0828875289. The cubic root of 400363398 is about 737.0293604716.

It can be divided in two parts, 40036 and 3398, that added together give a palindrome (43434).

The spelling of 400363398 in words is "four hundred million, three hundred sixty-three thousand, three hundred ninety-eight".