400130440 has 32 divisors (see below), whose sum is σ = 912980160. Its totient is φ = 157796800.

The previous prime is 400130431. The next prime is 400130551. The reversal of 400130440 is 44031004.

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 7 ways as a sum of consecutive naturals, for example, 67606 + ... + 73285.

It is an arithmetic number, because the mean of its divisors is an integer number (28530630).

Almost surely, 2^400130440 is an apocalyptic number.

400130440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400130440 is an abundant number, since it is smaller than the sum of its proper divisors (512849720).

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

400130440 is a wasteful number, since it uses less digits than its factorization.

400130440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140973 (or 140969 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 400130440 is about 20003.2607341903. The cubic root of 400130440 is about 736.8863818686.

Adding to 400130440 its reverse (44031004), we get a palindrome (444161444).

The spelling of 400130440 in words is "four hundred million, one hundred thirty thousand, four hundred forty".