400343104 has 56 divisors (see below), whose sum is σ = 911108160. Its totient is φ = 170973696.

The previous prime is 400343101. The next prime is 400343117. The reversal of 400343104 is 401343004.

It is a tau number, because it is divible by the number of its divisors (56).

It is not an unprimeable number, because it can be changed into a prime (400343101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140607 + ... + 143425.

Almost surely, 2^400343104 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 400343104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (455554080).

400343104 is an abundant number, since it is smaller than the sum of its proper divisors (510765056).

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

400343104 is a wasteful number, since it uses less digits than its factorization.

400343104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3155 (or 3145 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 400343104 is about 20008.5757614079. The cubic root of 400343104 is about 737.0169071799.

Adding to 400343104 its reverse (401343004), we get a palindrome (801686108).

The spelling of 400343104 in words is "four hundred million, three hundred forty-three thousand, one hundred four".