401166620 has 24 divisors (see below), whose sum is σ = 860376384. Its totient is φ = 157052096.

The previous prime is 401166581. The next prime is 401166637. The reversal of 401166620 is 26661104.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 401166620.

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, 212447 + ... + 214326.

It is an arithmetic number, because the mean of its divisors is an integer number (35849016).

Almost surely, 2^401166620 is an apocalyptic number.

It is an amenable number.

401166620 is an abundant number, since it is smaller than the sum of its proper divisors (459209764).

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

401166620 is a wasteful number, since it uses less digits than its factorization.

401166620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426829 (or 426827 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 401166620 is about 20029.1442652950. The cubic root of 401166620 is about 737.5219152733.

The spelling of 401166620 in words is "four hundred one million, one hundred sixty-six thousand, six hundred twenty".