401771016 has 80 divisors (see below), whose sum is σ = 1151581200. Its totient is φ = 130800096.

The previous prime is 401770997. The next prime is 401771023. The reversal of 401771016 is 610177104.

It is a super-2 number, since 2×401771016² = 322839898595344512, which contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 20655 + ... + 35073.

It is an arithmetic number, because the mean of its divisors is an integer number (14394765).

Almost surely, 2^401771016 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 401771016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (575790600).

401771016 is an abundant number, since it is smaller than the sum of its proper divisors (749810184).

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

401771016 is a wasteful number, since it uses less digits than its factorization.

401771016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14480 (or 14467 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 27.

The square root of 401771016 is about 20044.2265004165. The cubic root of 401771016 is about 737.8921119304.

The spelling of 401771016 in words is "four hundred one million, seven hundred seventy-one thousand, sixteen".