401128340 has 24 divisors (see below), whose sum is σ = 851838120. Its totient is φ = 158647808.

The previous prime is 401128339. The next prime is 401128363. The reversal of 401128340 is 43821104.

It can be written as a sum of positive squares in 4 ways, for example, as 17673616 + 383454724 = 4204^2 + 19582^2 .

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 110897 + ... + 114456.

It is an arithmetic number, because the mean of its divisors is an integer number (35493255).

Almost surely, 2^401128340 is an apocalyptic number.

It is an amenable number.

401128340 is an abundant number, since it is smaller than the sum of its proper divisors (450709780).

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

401128340 is a wasteful number, since it uses less digits than its factorization.

401128340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225451 (or 225449 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 401128340 is about 20028.1886350214. The cubic root of 401128340 is about 737.4984559960.

Adding to 401128340 its reverse (43821104), we get a palindrome (444949444).

The spelling of 401128340 in words is "four hundred one million, one hundred twenty-eight thousand, three hundred forty".