400008145 has 8 divisors (see below), whose sum is σ = 491173056. Its totient is φ = 312564336.

The previous prime is 400008143. The next prime is 400008149. The reversal of 400008145 is 541800004.

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 400008145 - 2¹ = 400008143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400008143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 930037 + ... + 930466.

It is an arithmetic number, because the mean of its divisors is an integer number (61396632).

Almost surely, 2^400008145 is an apocalyptic number.

It is an amenable number.

400008145 is a deficient number, since it is larger than the sum of its proper divisors (91164911).

400008145 is a wasteful number, since it uses less digits than its factorization.

400008145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1860551.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 400008145 is about 20000.2036239634. The cubic root of 400008145 is about 736.8113007669.

Adding to 400008145 its reverse (541800004), we get a palindrome (941808149).

The spelling of 400008145 in words is "four hundred million, eight thousand, one hundred forty-five".