400206212 has 24 divisors (see below), whose sum is σ = 801795456. Its totient is φ = 171220608.

The previous prime is 400206193. The next prime is 400206223. The reversal of 400206212 is 212602004.

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, 4553 + ... + 28655.

It is an arithmetic number, because the mean of its divisors is an integer number (33408144).

Almost surely, 2^400206212 is an apocalyptic number.

It is an amenable number.

400206212 is an abundant number, since it is smaller than the sum of its proper divisors (401589244).

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

400206212 is a wasteful number, since it uses less digits than its factorization.

400206212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24707 (or 24705 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 400206212 is about 20005.1546357433. The cubic root of 400206212 is about 736.9328932269.

Adding to 400206212 its reverse (212602004), we get a palindrome (612808216).

The spelling of 400206212 in words is "four hundred million, two hundred six thousand, two hundred twelve".