731664870 has 32 divisors (see below), whose sum is σ = 1859290848. Its totient is φ = 183633408.

The previous prime is 731664851. The next prime is 731664877. The reversal of 731664870 is 78466137.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731664877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 716809 + ... + 717828.

It is an arithmetic number, because the mean of its divisors is an integer number (58102839).

Almost surely, 2^731664870 is an apocalyptic number.

731664870 is an abundant number, since it is smaller than the sum of its proper divisors (1127625978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

731664870 is a wasteful number, since it uses less digits than its factorization.

731664870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1434664.

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 731664870 is about 27049.3044272861. The cubic root of 731664870 is about 901.0953207496.

The spelling of 731664870 in words is "seven hundred thirty-one million, six hundred sixty-four thousand, eight hundred seventy".