400540606 has 16 divisors (see below), whose sum is σ = 610511616. Its totient is φ = 197044056.

The previous prime is 400540583. The next prime is 400540619. The reversal of 400540606 is 606045004.

It is a happy number.

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, 173995 + ... + 176281.

It is an arithmetic number, because the mean of its divisors is an integer number (38156976).

Almost surely, 2^400540606 is an apocalyptic number.

400540606 is a deficient number, since it is larger than the sum of its proper divisors (209971010).

400540606 is a wasteful number, since it uses less digits than its factorization.

400540606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3663.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 400540606 is about 20013.5105866012. The cubic root of 400540606 is about 737.1380852240.

The spelling of 400540606 in words is "four hundred million, five hundred forty thousand, six hundred six".