70217140 has 96 divisors (see below), whose sum is σ = 180520704. Its totient is φ = 22394880.

The previous prime is 70217117. The next prime is 70217143. The reversal of 70217140 is 4171207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70217143) 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, 387850 + ... + 388030.

It is an arithmetic number, because the mean of its divisors is an integer number (1880424).

Almost surely, 2^70217140 is an apocalyptic number.

70217140 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 70217140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90260352).

70217140 is an abundant number, since it is smaller than the sum of its proper divisors (110303564).

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

70217140 is a wasteful number, since it uses less digits than its factorization.

70217140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377 (or 375 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 70217140 is about 8379.5668145794. The cubic root of 70217140 is about 412.5542310090.

Adding to 70217140 its reverse (4171207), we get a palindrome (74388347).

It can be divided in two parts, 7021 and 7140, that added together give a square (14161 = 119²).

The spelling of 70217140 in words is "seventy million, two hundred seventeen thousand, one hundred forty".