401698660 has 96 divisors (see below), whose sum is σ = 958874112. Its totient is φ = 140075520.

The previous prime is 401698601. The next prime is 401698697. The reversal of 401698660 is 66896104.

It is a super-2 number, since 2×401698660² = 322723626891591200, which contains 22 as substring.

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, 547654 + ... + 548386.

It is an arithmetic number, because the mean of its divisors is an integer number (9988272).

Almost surely, 2^401698660 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 401698660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (479437056).

401698660 is an abundant number, since it is smaller than the sum of its proper divisors (557175452).

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

401698660 is a wasteful number, since it uses less digits than its factorization.

401698660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853 (or 851 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 401698660 is about 20042.4215103864. The cubic root of 401698660 is about 737.8478129600.

The spelling of 401698660 in words is "four hundred one million, six hundred ninety-eight thousand, six hundred sixty".