720172870 has 32 divisors (see below), whose sum is σ = 1388016000. Its totient is φ = 268071936.

The previous prime is 720172861. The next prime is 720172879. The reversal of 720172870 is 78271027.

It is an interprime number because it is at equal distance from previous prime (720172861) and next prime (720172879).

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720172879) 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, 8670 + ... + 38929.

It is an arithmetic number, because the mean of its divisors is an integer number (43375500).

Almost surely, 2^720172870 is an apocalyptic number.

720172870 is a deficient number, since it is larger than the sum of its proper divisors (667843130).

720172870 is a wasteful number, since it uses less digits than its factorization.

720172870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47712.

The product of its (nonzero) digits is 10976, while the sum is 34.

The square root of 720172870 is about 26836.0367789284. The cubic root of 720172870 is about 896.3526750934.

The spelling of 720172870 in words is "seven hundred twenty million, one hundred seventy-two thousand, eight hundred seventy".