731385406 has 8 divisors (see below), whose sum is σ = 1097424720. Its totient is φ = 365577168.

The previous prime is 731385367. The next prime is 731385419. The reversal of 731385406 is 604583137.

731385406 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×731385406² = 1069849224219569672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49626 + ... + 62653.

It is an arithmetic number, because the mean of its divisors is an integer number (137178090).

Almost surely, 2^731385406 is an apocalyptic number.

731385406 is a deficient number, since it is larger than the sum of its proper divisors (366039314).

731385406 is a wasteful number, since it uses less digits than its factorization.

731385406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115538.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 731385406 is about 27044.1381079154. The cubic root of 731385406 is about 900.9805797975.

The spelling of 731385406 in words is "seven hundred thirty-one million, three hundred eighty-five thousand, four hundred six".