401135500 has 48 divisors (see below), whose sum is σ = 899799264. Its totient is φ = 156110400.

The previous prime is 401135491. The next prime is 401135509. The reversal of 401135500 is 5531104.

It is an interprime number because it is at equal distance from previous prime (401135491) and next prime (401135509).

It is not an unprimeable number, because it can be changed into a prime (401135509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7659 + ... + 29341.

It is an arithmetic number, because the mean of its divisors is an integer number (18745818).

Almost surely, 2^401135500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401135500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (449899632).

401135500 is an abundant number, since it is smaller than the sum of its proper divisors (498663764).

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

401135500 is a wasteful number, since it uses less digits than its factorization.

401135500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21739 (or 21727 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 401135500 is about 20028.3673822905. The cubic root of 401135500 is about 737.5028439994.

Adding to 401135500 its reverse (5531104), we get a palindrome (406666604).

The spelling of 401135500 in words is "four hundred one million, one hundred thirty-five thousand, five hundred".