401871000 has 128 divisors (see below), whose sum is σ = 1267680960. Its totient is φ = 105984000.

The previous prime is 401870983. The next prime is 401871013. The reversal of 401871000 is 178104.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 290310 + ... + 291690.

Almost surely, 2^401871000 is an apocalyptic number.

401871000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401871000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (633840480).

401871000 is an abundant number, since it is smaller than the sum of its proper divisors (865809960).

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

401871000 is a wasteful number, since it uses less digits than its factorization.

401871000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1502 (or 1488 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 401871000 is about 20046.7204300354. The cubic root of 401871000 is about 737.9533170139.

The spelling of 401871000 in words is "four hundred one million, eight hundred seventy-one thousand".