400103785 has 8 divisors (see below), whose sum is σ = 480328200. Its totient is φ = 319947264.

The previous prime is 400103783. The next prime is 400103797. The reversal of 400103785 is 587301004.

It can be written as a sum of positive squares in 4 ways, for example, as 254370601 + 145733184 = 15949^2 + 12072^2 .

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 400103785 - 2¹ = 400103783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400103783) 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, 2952 + ... + 28441.

It is an arithmetic number, because the mean of its divisors is an integer number (60041025).

Almost surely, 2^400103785 is an apocalyptic number.

It is an amenable number.

400103785 is a deficient number, since it is larger than the sum of its proper divisors (80224415).

400103785 is a wasteful number, since it uses less digits than its factorization.

400103785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33947.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 400103785 is about 20002.5944567199. The cubic root of 400103785 is about 736.8700187523.

Adding to 400103785 its reverse (587301004), we get a palindrome (987404789).

The spelling of 400103785 in words is "four hundred million, one hundred three thousand, seven hundred eighty-five".