400520132 has 12 divisors (see below), whose sum is σ = 701105580. Its totient is φ = 200204256.

The previous prime is 400520077. The next prime is 400520167. The reversal of 400520132 is 231025004.

It can be written as a sum of positive squares in 2 ways, for example, as 317053636 + 83466496 = 17806^2 + 9136^2 .

It is a super-2 number, since 2×400520132² = 320832752274594848, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 400520132.

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 3 ways as a sum of consecutive naturals, for example, 5078 + ... + 28754.

It is an arithmetic number, because the mean of its divisors is an integer number (58425465).

Almost surely, 2^400520132 is an apocalyptic number.

It is an amenable number.

400520132 is a deficient number, since it is larger than the sum of its proper divisors (300585448).

400520132 is a wasteful number, since it uses less digits than its factorization.

400520132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27910 (or 27908 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 400520132 is about 20012.9990756008. Note that the first 3 decimals coincide. The cubic root of 400520132 is about 737.1255251805.

Adding to 400520132 its reverse (231025004), we get a palindrome (631545136).

The spelling of 400520132 in words is "four hundred million, five hundred twenty thousand, one hundred thirty-two".