400345360 has 40 divisors (see below), whose sum is σ = 971277120. Its totient is φ = 153174912.

The previous prime is 400345343. The next prime is 400345367. The reversal of 400345360 is 63543004.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (400345367) 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, 106950 + ... + 110629.

It is an arithmetic number, because the mean of its divisors is an integer number (24281928).

Almost surely, 2^400345360 is an apocalyptic number.

400345360 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400345360 is an abundant number, since it is smaller than the sum of its proper divisors (570931760).

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

400345360 is a wasteful number, since it uses less digits than its factorization.

400345360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217615 (or 217609 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 400345360 is about 20008.6321371552. The cubic root of 400345360 is about 737.0182915816.

Adding to 400345360 its reverse (63543004), we get a palindrome (463888364).

The spelling of 400345360 in words is "four hundred million, three hundred forty-five thousand, three hundred sixty".