731664346 has 16 divisors (see below), whose sum is σ = 1270160640. Its totient is φ = 309600720.

The previous prime is 731664319. The next prime is 731664347. The reversal of 731664346 is 643466137.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 731664299 and 731664308.

It is not an unprimeable number, because it can be changed into a prime (731664347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 329665 + ... + 331876.

It is an arithmetic number, because the mean of its divisors is an integer number (79385040).

Almost surely, 2^731664346 is an apocalyptic number.

731664346 is a deficient number, since it is larger than the sum of its proper divisors (538496294).

731664346 is a wasteful number, since it uses less digits than its factorization.

731664346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661629.

The product of its digits is 217728, while the sum is 40.

The square root of 731664346 is about 27049.2947412682. The cubic root of 731664346 is about 901.0951056356.

The spelling of 731664346 in words is "seven hundred thirty-one million, six hundred sixty-four thousand, three hundred forty-six".