400245305 has 8 divisors (see below), whose sum is σ = 481138944. Its totient is φ = 319633200.

The previous prime is 400245301. The next prime is 400245311. The reversal of 400245305 is 503542004.

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

It is not a de Polignac number, because 400245305 - 2² = 400245301 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400245301) 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, 67241 + ... + 72950.

It is an arithmetic number, because the mean of its divisors is an integer number (60142368).

Almost surely, 2^400245305 is an apocalyptic number.

It is an amenable number.

400245305 is a deficient number, since it is larger than the sum of its proper divisors (80893639).

400245305 is a wasteful number, since it uses less digits than its factorization.

400245305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140767.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 400245305 is about 20006.1316850610. The cubic root of 400245305 is about 736.9568875068.

Adding to 400245305 its reverse (503542004), we get a palindrome (903787309).

The spelling of 400245305 in words is "four hundred million, two hundred forty-five thousand, three hundred five".