400165212 has 24 divisors (see below), whose sum is σ = 958955536. Its totient is φ = 129783168.

The previous prime is 400165141. The next prime is 400165219. The reversal of 400165212 is 212561004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400165219) 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, 450193 + ... + 451080.

Almost surely, 2^400165212 is an apocalyptic number.

It is an amenable number.

400165212 is an abundant number, since it is smaller than the sum of its proper divisors (558790324).

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

400165212 is a wasteful number, since it uses less digits than its factorization.

400165212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901317 (or 901315 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 400165212 is about 20004.1298736036. The cubic root of 400165212 is about 736.9077268005.

The spelling of 400165212 in words is "four hundred million, one hundred sixty-five thousand, two hundred twelve".