400039796 has 12 divisors (see below), whose sum is σ = 753921252. Its totient is φ = 184633728.

The previous prime is 400039789. The next prime is 400039807. The reversal of 400039796 is 697930004.

It can be written as a sum of positive squares in 2 ways, for example, as 151536100 + 248503696 = 12310^2 + 15764^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3846485 + ... + 3846588.

It is an arithmetic number, because the mean of its divisors is an integer number (62826771).

Almost surely, 2^400039796 is an apocalyptic number.

It is an amenable number.

400039796 is a deficient number, since it is larger than the sum of its proper divisors (353881456).

400039796 is a wasteful number, since it uses less digits than its factorization.

400039796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7693090 (or 7693088 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 400039796 is about 20000.9948752556. The cubic root of 400039796 is about 736.8307338707.

The spelling of 400039796 in words is "four hundred million, thirty-nine thousand, seven hundred ninety-six".