401040080 has 40 divisors (see below), whose sum is σ = 1065622272. Its totient is φ = 137499264.

The previous prime is 401040067. The next prime is 401040083. The reversal of 401040080 is 80040104.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401040083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 357512 + ... + 358631.

Almost surely, 2^401040080 is an apocalyptic number.

401040080 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401040080 is an abundant number, since it is smaller than the sum of its proper divisors (664582192).

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

401040080 is a wasteful number, since it uses less digits than its factorization.

401040080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716163 (or 716157 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 401040080 is about 20025.9851193393. The cubic root of 401040080 is about 737.4443615979. Note that the first 3 decimals are identical.

Adding to 401040080 its reverse (80040104), we get a palindrome (481080184).

The spelling of 401040080 in words is "four hundred one million, forty thousand, eighty".