400325144 has 8 divisors (see below), whose sum is σ = 750609660. Its totient is φ = 200162568.

The previous prime is 400325137. The next prime is 400325147. The reversal of 400325144 is 441523004.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400325147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25020314 + ... + 25020329.

Almost surely, 2^400325144 is an apocalyptic number.

It is an amenable number.

400325144 is a deficient number, since it is larger than the sum of its proper divisors (350284516).

400325144 is a wasteful number, since it uses less digits than its factorization.

400325144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50040649 (or 50040645 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 400325144 is about 20008.1269488176. The cubic root of 400325144 is about 737.0058857823.

Adding to 400325144 its reverse (441523004), we get a palindrome (841848148).

The spelling of 400325144 in words is "four hundred million, three hundred twenty-five thousand, one hundred forty-four".