401208240 has 80 divisors (see below), whose sum is σ = 1253634048. Its totient is φ = 106138368.

The previous prime is 401208221. The next prime is 401208287. The reversal of 401208240 is 42802104.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23899 + ... + 37061.

Almost surely, 2^401208240 is an apocalyptic number.

401208240 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 401208240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (626817024).

401208240 is an abundant number, since it is smaller than the sum of its proper divisors (852425808).

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

401208240 is a wasteful number, since it uses less digits than its factorization.

401208240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13306 (or 13300 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 401208240 is about 20030.1832243242. The cubic root of 401208240 is about 737.5474197222.

The spelling of 401208240 in words is "four hundred one million, two hundred eight thousand, two hundred forty".