400343202 has 128 divisors (see below), whose sum is σ = 1071360000. Its totient is φ = 108392256.

The previous prime is 400343197. The next prime is 400343239. The reversal of 400343202 is 202343004.

It is a super-2 number, since 2×400343202² = 320549358775225608, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 646449 + ... + 647067.

It is an arithmetic number, because the mean of its divisors is an integer number (8370000).

Almost surely, 2^400343202 is an apocalyptic number.

400343202 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 400343202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (535680000).

400343202 is an abundant number, since it is smaller than the sum of its proper divisors (671016798).

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

400343202 is a wasteful number, since it uses less digits than its factorization.

400343202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725 (or 719 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 400343202 is about 20008.5782103577. The cubic root of 400343202 is about 737.0169673180.

Adding to 400343202 its reverse (202343004), we get a palindrome (602686206).

The spelling of 400343202 in words is "four hundred million, three hundred forty-three thousand, two hundred two".