720643474 has 8 divisors (see below), whose sum is σ = 1082765628. Its totient is φ = 359721600.

The previous prime is 720643463. The next prime is 720643501. The reversal of 720643474 is 474346027.

It can be written as a sum of positive squares in 2 ways, for example, as 692479225 + 28164249 = 26315^2 + 5307^2 .

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

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, 298567 + ... + 300970.

Almost surely, 2^720643474 is an apocalyptic number.

720643474 is a deficient number, since it is larger than the sum of its proper divisors (362122154).

720643474 is a wasteful number, since it uses less digits than its factorization.

720643474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600140.

The product of its (nonzero) digits is 112896, while the sum is 37.

The square root of 720643474 is about 26844.8034822384. The cubic root of 720643474 is about 896.5478760528.

The spelling of 720643474 in words is "seven hundred twenty million, six hundred forty-three thousand, four hundred seventy-four".