401890800 has 120 divisors (see below), whose sum is σ = 1295274240. Its totient is φ = 106515200.

The previous prime is 401890777. The next prime is 401890837. The reversal of 401890800 is 8098104.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 213865 + ... + 215735.

It is an arithmetic number, because the mean of its divisors is an integer number (10793952).

Almost surely, 2^401890800 is an apocalyptic number.

401890800 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 401890800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (647637120).

401890800 is an abundant number, since it is smaller than the sum of its proper divisors (893383440).

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

401890800 is a wasteful number, since it uses less digits than its factorization.

401890800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2071 (or 2060 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 401890800 is about 20047.2142703170. The cubic root of 401890800 is about 737.9654363554.

The spelling of 401890800 in words is "four hundred one million, eight hundred ninety thousand, eight hundred".