400684606 has 16 divisors (see below), whose sum is σ = 687144960. Its totient is φ = 171657720.

The previous prime is 400684601. The next prime is 400684643. The reversal of 400684606 is 606486004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400684601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68871 + ... + 74461.

It is an arithmetic number, because the mean of its divisors is an integer number (42946560).

Almost surely, 2^400684606 is an apocalyptic number.

400684606 is a deficient number, since it is larger than the sum of its proper divisors (286460354).

400684606 is a wasteful number, since it uses less digits than its factorization.

400684606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10719.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 400684606 is about 20017.1078330512. The cubic root of 400684606 is about 737.2264118211.

The spelling of 400684606 in words is "four hundred million, six hundred eighty-four thousand, six hundred six".