400601312 has 24 divisors (see below), whose sum is σ = 799796592. Its totient is φ = 197478400.

The previous prime is 400601309. The next prime is 400601317. The reversal of 400601312 is 213106004.

It is a super-2 number, since 2×400601312² = 320962822352242688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400601317) by changing a digit.

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, 85889 + ... + 90432.

It is an arithmetic number, because the mean of its divisors is an integer number (33324858).

Almost surely, 2^400601312 is an apocalyptic number.

It is an amenable number.

400601312 is a deficient number, since it is larger than the sum of its proper divisors (399195280).

400601312 is a wasteful number, since it uses less digits than its factorization.

400601312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176402 (or 176394 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 400601312 is about 20015.0271546156. The cubic root of 400601312 is about 737.1753235992.

Adding to 400601312 its reverse (213106004), we get a palindrome (613707316).

The spelling of 400601312 in words is "four hundred million, six hundred one thousand, three hundred twelve".