720456 has 32 divisors (see below), whose sum is σ = 1965600. Its totient is φ = 218240.

The previous prime is 720439. The next prime is 720481. The reversal of 720456 is 654027.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1101 + ... + 1628.

It is an arithmetic number, because the mean of its divisors is an integer number (61425).

2⁷²⁰⁴⁵⁶ is an apocalyptic number.

It is an amenable number.

720456 is an abundant number, since it is smaller than the sum of its proper divisors (1245144).

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

720456 is a wasteful number, since it uses less digits than its factorization.

720456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2749 (or 2745 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 720456 is about 848.7967954699. The cubic root of 720456 is about 89.6470124247.

It can be divided in two parts, 7204 and 56, that added together give a triangular number (7260 = T₁₂₀).

The spelling of 720456 in words is "seven hundred twenty thousand, four hundred fifty-six".