720746 has 16 divisors (see below), whose sum is σ = 1226400. Its totient is φ = 314928.

The previous prime is 720743. The next prime is 720763. The reversal of 720746 is 647027.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (720743) 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, 236 + ... + 1223.

It is an arithmetic number, because the mean of its divisors is an integer number (76650).

2⁷²⁰⁷⁴⁶ is an apocalyptic number.

720746 is a deficient number, since it is larger than the sum of its proper divisors (505654).

720746 is a wasteful number, since it uses less digits than its factorization.

720746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1493.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 720746 is about 848.9676083338. The cubic root of 720746 is about 89.6590391347.

The spelling of 720746 in words is "seven hundred twenty thousand, seven hundred forty-six".