400073745 has 32 divisors (see below), whose sum is σ = 648716544. Its totient is φ = 210528000.

The previous prime is 400073741. The next prime is 400073761. The reversal of 400073745 is 547370004.

It is not a de Polignac number, because 400073745 - 2² = 400073741 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (400073741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 391335 + ... + 392355.

It is an arithmetic number, because the mean of its divisors is an integer number (20272392).

Almost surely, 2^400073745 is an apocalyptic number.

It is an amenable number.

400073745 is a deficient number, since it is larger than the sum of its proper divisors (248642799).

400073745 is a wasteful number, since it uses less digits than its factorization.

400073745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1353.

The product of its (nonzero) digits is 11760, while the sum is 30.

The square root of 400073745 is about 20001.8435400340. The cubic root of 400073745 is about 736.8515767629.

The spelling of 400073745 in words is "four hundred million, seventy-three thousand, seven hundred forty-five".