709540 has 24 divisors (see below), whose sum is σ = 1605240. Its totient is φ = 261888.

The previous prime is 709537. The next prime is 709547. The reversal of 709540 is 45907.

709540 = T₁₆₈ + T₁₆₉ + ... + T₂₀₇.

709540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 119716 + 589824 = 346^2 + 768^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (709547) 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, 1105 + ... + 1624.

It is an arithmetic number, because the mean of its divisors is an integer number (66885).

2⁷⁰⁹⁵⁴⁰ is an apocalyptic number.

It is an amenable number.

709540 is an abundant number, since it is smaller than the sum of its proper divisors (895700).

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

709540 is a wasteful number, since it uses less digits than its factorization.

709540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2751 (or 2749 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 709540 is about 842.3419733101. The cubic root of 709540 is about 89.1919436107.

The spelling of 709540 in words is "seven hundred nine thousand, five hundred forty".