400420206 has 32 divisors (see below), whose sum is σ = 890714880. Its totient is φ = 133339608.

The previous prime is 400420187. The next prime is 400420217. The reversal of 400420206 is 602024004.

400420206 = T₁₅₃ + T₁₅₄ + ... + T₁₃₃₉.

400420206 is a `hidden beast` number, since 40 + 0 + 420 + 206 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60975 + ... + 67221.

It is an arithmetic number, because the mean of its divisors is an integer number (27834840).

Almost surely, 2^400420206 is an apocalyptic number.

400420206 is an abundant number, since it is smaller than the sum of its proper divisors (490294674).

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

400420206 is a wasteful number, since it uses less digits than its factorization.

400420206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7445 (or 7439 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 400420206 is about 20010.5023924938. The cubic root of 400420206 is about 737.0642181234.

The spelling of 400420206 in words is "four hundred million, four hundred twenty thousand, two hundred six".