705405140 has 96 divisors (see below), whose sum is σ = 1747920384. Its totient is φ = 236226560.

The previous prime is 705405137. The next prime is 705405149. The reversal of 705405140 is 41504507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (705405149) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 173774 + ... + 177786.

It is an arithmetic number, because the mean of its divisors is an integer number (18207504).

Almost surely, 2^705405140 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 705405140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (873960192).

705405140 is an abundant number, since it is smaller than the sum of its proper divisors (1042515244).

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

705405140 is a wasteful number, since it uses less digits than its factorization.

705405140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4097 (or 4095 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 705405140 is about 26559.4642265238. The cubic root of 705405140 is about 890.1834995957.

Adding to 705405140 its reverse (41504507), we get a palindrome (746909647).

The spelling of 705405140 in words is "seven hundred five million, four hundred five thousand, one hundred forty".