400123196 has 24 divisors (see below), whose sum is σ = 775278336. Its totient is φ = 179158320.

The previous prime is 400123193. The next prime is 400123201. The reversal of 400123196 is 691321004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400123193) 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 7 ways as a sum of consecutive naturals, for example, 64916 + ... + 70811.

It is an arithmetic number, because the mean of its divisors is an integer number (32303264).

Almost surely, 2^400123196 is an apocalyptic number.

It is an amenable number.

400123196 is a deficient number, since it is larger than the sum of its proper divisors (375155140).

400123196 is a wasteful number, since it uses less digits than its factorization.

400123196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135809 (or 135807 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 400123196 is about 20003.0796628919. The cubic root of 400123196 is about 736.8819349544.

The spelling of 400123196 in words is "four hundred million, one hundred twenty-three thousand, one hundred ninety-six".