70205440 has 60 divisors (see below), whose sum is σ = 168684516. Its totient is φ = 28049408.

The previous prime is 70205423. The next prime is 70205441. The reversal of 70205440 is 4450207.

It can be written as a sum of positive squares in 2 ways, for example, as 47775744 + 22429696 = 6912^2 + 4736^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70205441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81492 + ... + 82348.

Almost surely, 2^70205440 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 70205440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84342258).

70205440 is an abundant number, since it is smaller than the sum of its proper divisors (98479076).

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

70205440 is an frugal number, since it uses more digits than its factorization.

70205440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890 (or 864 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 70205440 is about 8378.8686587152. The cubic root of 70205440 is about 412.5313156513.

Adding to 70205440 its reverse (4450207), we get a palindrome (74655647).

The spelling of 70205440 in words is "seventy million, two hundred five thousand, four hundred forty".