401018556 has 24 divisors (see below), whose sum is σ = 936762624. Its totient is φ = 133522480.

The previous prime is 401018551. The next prime is 401018557. The reversal of 401018556 is 655810104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401018551) 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, 7410 + ... + 29273.

It is an arithmetic number, because the mean of its divisors is an integer number (39031776).

Almost surely, 2^401018556 is an apocalyptic number.

It is an amenable number.

401018556 is an abundant number, since it is smaller than the sum of its proper divisors (535744068).

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

401018556 is a wasteful number, since it uses less digits than its factorization.

401018556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37601 (or 37599 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 401018556 is about 20025.4477103509. The cubic root of 401018556 is about 737.4311683726.

The spelling of 401018556 in words is "four hundred one million, eighteen thousand, five hundred fifty-six".