400340145 has 8 divisors (see below), whose sum is σ = 640544256. Its totient is φ = 213514736.

The previous prime is 400340141. The next prime is 400340147. The reversal of 400340145 is 541043004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400340145 - 2² = 400340141 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (400340141) 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 7 ways as a sum of consecutive naturals, for example, 13344657 + ... + 13344686.

It is an arithmetic number, because the mean of its divisors is an integer number (80068032).

Almost surely, 2^400340145 is an apocalyptic number.

It is an amenable number.

400340145 is a deficient number, since it is larger than the sum of its proper divisors (240204111).

400340145 is a wasteful number, since it uses less digits than its factorization.

400340145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26689351.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 400340145 is about 20008.5018179773. The cubic root of 400340145 is about 737.0150913721.

Adding to 400340145 its reverse (541043004), we get a palindrome (941383149).

The spelling of 400340145 in words is "four hundred million, three hundred forty thousand, one hundred forty-five".