401186840 has 16 divisors (see below), whose sum is σ = 902670480. Its totient is φ = 160474720.

The previous prime is 401186837. The next prime is 401186867. The reversal of 401186840 is 48681104.

It is a junction number, because it is equal to n+sod(n) for n = 401186797 and 401186806.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5014796 + ... + 5014875.

It is an arithmetic number, because the mean of its divisors is an integer number (56416905).

Almost surely, 2^401186840 is an apocalyptic number.

401186840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401186840 is an abundant number, since it is smaller than the sum of its proper divisors (501483640).

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

401186840 is a wasteful number, since it uses less digits than its factorization.

401186840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10029682 (or 10029678 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 401186840 is about 20029.6490233853. The cubic root of 401186840 is about 737.5343061701.

The spelling of 401186840 in words is "four hundred one million, one hundred eighty-six thousand, eight hundred forty".