709243920 has 360 divisors, whose sum is σ = 2994683328. Its totient is φ = 147248640.

The previous prime is 709243919. The next prime is 709243957. The reversal of 709243920 is 29342907.

It is a tau number, because it is divible by the number of its divisors (360).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 609259 + ... + 610421.

Almost surely, 2^709243920 is an apocalyptic number.

709243920 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 709243920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1497341664).

709243920 is an abundant number, since it is smaller than the sum of its proper divisors (2285439408).

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

709243920 is a wasteful number, since it uses less digits than its factorization.

709243920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211 (or 1191 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 709243920 is about 26631.6338214538. The cubic root of 709243920 is about 891.7953574798.

The spelling of 709243920 in words is "seven hundred nine million, two hundred forty-three thousand, nine hundred twenty".