400343160 has 64 divisors (see below), whose sum is σ = 1372608000. Its totient is φ = 91506816.

The previous prime is 400343131. The next prime is 400343161. The reversal of 400343160 is 61343004.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400343161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 237460 + ... + 239139.

It is an arithmetic number, because the mean of its divisors is an integer number (21447000).

Almost surely, 2^400343160 is an apocalyptic number.

400343160 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400343160 is an abundant number, since it is smaller than the sum of its proper divisors (972264840).

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

400343160 is a wasteful number, since it uses less digits than its factorization.

400343160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476620 (or 476616 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 400343160 is about 20008.5771608078. The cubic root of 400343160 is about 737.0169415445.

Adding to 400343160 its reverse (61343004), we get a palindrome (461686164).

The spelling of 400343160 in words is "four hundred million, three hundred forty-three thousand, one hundred sixty".