401073840 has 120 divisors (see below), whose sum is σ = 1352474448. Its totient is φ = 106513920.

The previous prime is 401073823. The next prime is 401073847. The reversal of 401073840 is 48370104.

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

It is not an unprimeable number, because it can be changed into a prime (401073847) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 198435 + ... + 200445.

Almost surely, 2^401073840 is an apocalyptic number.

401073840 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 401073840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (676237224).

401073840 is an abundant number, since it is smaller than the sum of its proper divisors (951400608).

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

401073840 is a wasteful number, since it uses less digits than its factorization.

401073840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2307 (or 2298 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 401073840 is about 20026.8280064517. The cubic root of 401073840 is about 737.4650539795.

The spelling of 401073840 in words is "four hundred one million, seventy-three thousand, eight hundred forty".