709870 has 16 divisors (see below), whose sum is σ = 1460448. Its totient is φ = 243360.

The previous prime is 709861. The next prime is 709871. The reversal of 709870 is 78907.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (709871) 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, 5001 + ... + 5140.

It is an arithmetic number, because the mean of its divisors is an integer number (91278).

2⁷⁰⁹⁸⁷⁰ is an apocalyptic number.

709870 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

709870 is an abundant number, since it is smaller than the sum of its proper divisors (750578).

It is a weird number, because it is abundant, but not a pseudoperfect number.

709870 is a wasteful number, since it uses less digits than its factorization.

709870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10155.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 709870 is about 842.5378329784. The cubic root of 709870 is about 89.2057688963.

It can be divided in two parts, 70 and 9870, that multiplied together give a triangular number (690900 = T₁₁₇₅).

The spelling of 709870 in words is "seven hundred nine thousand, eight hundred seventy".