400938785 has 16 divisors (see below), whose sum is σ = 519208704. Its totient is φ = 295465152.

The previous prime is 400938781. The next prime is 400938823. The reversal of 400938785 is 587839004.

It is a cyclic number.

It is not a de Polignac number, because 400938785 - 2² = 400938781 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400938781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26564 + ... + 38826.

It is an arithmetic number, because the mean of its divisors is an integer number (32450544).

Almost surely, 2^400938785 is an apocalyptic number.

It is an amenable number.

400938785 is a deficient number, since it is larger than the sum of its proper divisors (118269919).

400938785 is a wasteful number, since it uses less digits than its factorization.

400938785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12784.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 400938785 is about 20023.4558705534. The cubic root of 400938785 is about 737.3822682890.

The spelling of 400938785 in words is "four hundred million, nine hundred thirty-eight thousand, seven hundred eighty-five".