709937820 has 144 divisors (see below), whose sum is σ = 2271080448. Its totient is φ = 179245440.

The previous prime is 709937797. The next prime is 709937827. The reversal of 709937820 is 28739907.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (709937827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 260907 + ... + 263613.

It is an arithmetic number, because the mean of its divisors is an integer number (15771392).

Almost surely, 2^709937820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 709937820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1135540224).

709937820 is an abundant number, since it is smaller than the sum of its proper divisors (1561142628).

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

709937820 is a wasteful number, since it uses less digits than its factorization.

709937820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2800 (or 2795 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 709937820 is about 26644.6583764927. The cubic root of 709937820 is about 892.0860967121.

The spelling of 709937820 in words is "seven hundred nine million, nine hundred thirty-seven thousand, eight hundred twenty".