401970660 has 192 divisors, whose sum is σ = 1403523072. Its totient is φ = 83695104.

The previous prime is 401970643. The next prime is 401970671. The reversal of 401970660 is 66079104.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 452737 + ... + 453623.

It is an arithmetic number, because the mean of its divisors is an integer number (7310016).

Almost surely, 2^401970660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401970660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (701761536).

401970660 is an abundant number, since it is smaller than the sum of its proper divisors (1001552412).

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

401970660 is a wasteful number, since it uses less digits than its factorization.

401970660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002 (or 1000 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 401970660 is about 20049.2059693146. The cubic root of 401970660 is about 738.0143136596.

The spelling of 401970660 in words is "four hundred one million, nine hundred seventy thousand, six hundred sixty".