400330145 has 4 divisors (see below), whose sum is σ = 480396180. Its totient is φ = 320264112.

The previous prime is 400330141. The next prime is 400330193. The reversal of 400330145 is 541033004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 93624976 + 306705169 = 9676^2 + 17513^2 .

It is a cyclic number.

It is not a de Polignac number, because 400330145 - 2² = 400330141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400330141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40033010 + ... + 40033019.

It is an arithmetic number, because the mean of its divisors is an integer number (120099045).

Almost surely, 2^400330145 is an apocalyptic number.

It is an amenable number.

400330145 is a deficient number, since it is larger than the sum of its proper divisors (80066035).

400330145 is an equidigital number, since it uses as much as digits as its factorization.

400330145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80066034.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 400330145 is about 20008.2519226443. The cubic root of 400330145 is about 737.0089547469.

Adding to 400330145 its reverse (541033004), we get a palindrome (941363149).

The spelling of 400330145 in words is "four hundred million, three hundred thirty thousand, one hundred forty-five".