720735434 has 16 divisors (see below), whose sum is σ = 1184171400. Its totient is φ = 327473664.

The previous prime is 720735377. The next prime is 720735437. The reversal of 720735434 is 434537027.

It can be written as a sum of positive squares in 4 ways, for example, as 696696025 + 24039409 = 26395^2 + 4903^2 .

It is a junction number, because it is equal to n+sod(n) for n = 720735394 and 720735403.

It is not an unprimeable number, because it can be changed into a prime (720735437) 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, 364499 + ... + 366470.

Almost surely, 2^720735434 is an apocalyptic number.

720735434 is a deficient number, since it is larger than the sum of its proper divisors (463435966).

720735434 is a wasteful number, since it uses less digits than its factorization.

720735434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731017.

The product of its (nonzero) digits is 70560, while the sum is 35.

The square root of 720735434 is about 26846.5162358173. The cubic root of 720735434 is about 896.5860100441.

The spelling of 720735434 in words is "seven hundred twenty million, seven hundred thirty-five thousand, four hundred thirty-four".