709974720 has 840 divisors, whose sum is σ = 3237396624. Its totient is φ = 146313216.

The previous prime is 709974709. The next prime is 709974721. The reversal of 709974720 is 27479907.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (840).

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

It is not an unprimeable number, because it can be changed into a prime (709974721) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 16511019 + ... + 16511061.

Almost surely, 2^709974720 is an apocalyptic number.

709974720 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 709974720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1618698312).

709974720 is an abundant number, since it is smaller than the sum of its proper divisors (2527421904).

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

709974720 is a wasteful number, since it uses less digits than its factorization.

709974720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 73 counting only the distinct ones).

The product of its (nonzero) digits is 222264, while the sum is 45.

The square root of 709974720 is about 26645.3508139788. The cubic root of 709974720 is about 892.1015522472.

The spelling of 709974720 in words is "seven hundred nine million, nine hundred seventy-four thousand, seven hundred twenty".