400344212 has 24 divisors (see below), whose sum is σ = 740728800. Its totient is φ = 188800416.

The previous prime is 400344179. The next prime is 400344223. The reversal of 400344212 is 212443004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5903 + ... + 28905.

It is an arithmetic number, because the mean of its divisors is an integer number (30863700).

Almost surely, 2^400344212 is an apocalyptic number.

It is an amenable number.

400344212 is a deficient number, since it is larger than the sum of its proper divisors (340384588).

400344212 is a wasteful number, since it uses less digits than its factorization.

400344212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23255 (or 23253 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 400344212 is about 20008.6034495164. The cubic root of 400344212 is about 737.0175871083.

Adding to 400344212 its reverse (212443004), we get a palindrome (612787216).

The spelling of 400344212 in words is "four hundred million, three hundred forty-four thousand, two hundred twelve".