400500340 has 24 divisors (see below), whose sum is σ = 842493960. Its totient is φ = 159925248.

The previous prime is 400500299. The next prime is 400500343. The reversal of 400500340 is 43005004.

It can be written as a sum of positive squares in 4 ways, for example, as 116510436 + 283989904 = 10794^2 + 16852^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400500343) 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, 5025 + ... + 28744.

It is an arithmetic number, because the mean of its divisors is an integer number (35103915).

Almost surely, 2^400500340 is an apocalyptic number.

It is an amenable number.

400500340 is an abundant number, since it is smaller than the sum of its proper divisors (441993620).

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

400500340 is a wasteful number, since it uses less digits than its factorization.

400500340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34371 (or 34369 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 400500340 is about 20012.5045908802. The cubic root of 400500340 is about 737.1133831119.

Adding to 400500340 its reverse (43005004), we get a palindrome (443505344).

The spelling of 400500340 in words is "four hundred million, five hundred thousand, three hundred forty".