401208660 has 96 divisors (see below), whose sum is σ = 1252742400. Its totient is φ = 106600320.

The previous prime is 401208659. The next prime is 401208671. The reversal of 401208660 is 66802104.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 166746 + ... + 169134.

It is an arithmetic number, because the mean of its divisors is an integer number (13049400).

Almost surely, 2^401208660 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 401208660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (626371200).

401208660 is an abundant number, since it is smaller than the sum of its proper divisors (851533740).

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

401208660 is a wasteful number, since it uses less digits than its factorization.

401208660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2718 (or 2710 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 401208660 is about 20030.1937084992. The cubic root of 401208660 is about 737.5476770863.

The spelling of 401208660 in words is "four hundred one million, two hundred eight thousand, six hundred sixty".