400726345172 has 24 divisors (see below), whose sum is σ = 705485448192. Its totient is φ = 199160690400.

The previous prime is 400726345153. The next prime is 400726345199. The reversal of 400726345172 is 271543627004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 794222 + ... + 1196762.

It is an arithmetic number, because the mean of its divisors is an integer number (29395227008).

Almost surely, 2^400726345172 is an apocalyptic number.

It is an amenable number.

400726345172 is a deficient number, since it is larger than the sum of its proper divisors (304759103020).

400726345172 is a wasteful number, since it uses less digits than its factorization.

400726345172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404039 (or 404037 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 41.

The spelling of 400726345172 in words is "four hundred billion, seven hundred twenty-six million, three hundred forty-five thousand, one hundred seventy-two".