401055540 has 24 divisors (see below), whose sum is σ = 1122955680. Its totient is φ = 106948128.

The previous prime is 401055533. The next prime is 401055601. The reversal of 401055540 is 45550104.

It is a self number, because there is not a number n which added to its sum of digits gives 401055540.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3342070 + ... + 3342189.

It is an arithmetic number, because the mean of its divisors is an integer number (46789820).

Almost surely, 2^401055540 is an apocalyptic number.

It is an amenable number.

401055540 is an abundant number, since it is smaller than the sum of its proper divisors (721900140).

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

401055540 is a wasteful number, since it uses less digits than its factorization.

401055540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6684271 (or 6684269 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 401055540 is about 20026.3711141085. The cubic root of 401055540 is about 737.4538375779.

The spelling of 401055540 in words is "four hundred one million, fifty-five thousand, five hundred forty".