731626645 has 8 divisors (see below), whose sum is σ = 908226360. Its totient is φ = 565118400.

The previous prime is 731626633. The next prime is 731626669. The reversal of 731626645 is 546626137.

It can be written as a sum of positive squares in 4 ways, for example, as 86436 + 731540209 = 294^2 + 27047^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-731626645 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 731626598 and 731626607.

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, 2522706 + ... + 2522995.

It is an arithmetic number, because the mean of its divisors is an integer number (113528295).

Almost surely, 2^731626645 is an apocalyptic number.

It is an amenable number.

731626645 is a deficient number, since it is larger than the sum of its proper divisors (176599715).

731626645 is a wasteful number, since it uses less digits than its factorization.

731626645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5045735.

The product of its digits is 181440, while the sum is 40.

The square root of 731626645 is about 27048.5978379656. The cubic root of 731626645 is about 901.0796282425.

The spelling of 731626645 in words is "seven hundred thirty-one million, six hundred twenty-six thousand, six hundred forty-five".