401298660 has 144 divisors (see below), whose sum is σ = 1397200896. Its totient is φ = 91328256.

The previous prime is 401298659. The next prime is 401298671. The reversal of 401298660 is 66892104.

It is a super-2 number, since 2×401298660² = 322081229035591200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 368637 + ... + 369723.

It is an arithmetic number, because the mean of its divisors is an integer number (9702784).

Almost surely, 2^401298660 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 401298660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (698600448).

401298660 is an abundant number, since it is smaller than the sum of its proper divisors (995902236).

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

401298660 is a wasteful number, since it uses less digits than its factorization.

401298660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1402 (or 1397 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 401298660 is about 20032.4401908504. The cubic root of 401298660 is about 737.6028223966.

The spelling of 401298660 in words is "four hundred one million, two hundred ninety-eight thousand, six hundred sixty".