71470140 has 48 divisors (see below), whose sum is σ = 228705792. Its totient is φ = 16335936.

The previous prime is 71470117. The next prime is 71470141. The reversal of 71470140 is 4107417.

It is a self number, because there is not a number n which added to its sum of digits gives 71470140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71470141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84664 + ... + 85503.

It is an arithmetic number, because the mean of its divisors is an integer number (4764704).

Almost surely, 2^71470140 is an apocalyptic number.

71470140 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

71470140 is an abundant number, since it is smaller than the sum of its proper divisors (157235652).

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

71470140 is a wasteful number, since it uses less digits than its factorization.

71470140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170186 (or 170184 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 24.

The square root of 71470140 is about 8454.0014194463. The cubic root of 71470140 is about 414.9937387162.

Subtracting from 71470140 its sum of digits (24), we obtain a square (71470116 = 8454²).

Adding to 71470140 its reverse (4107417), we get a palindrome (75577557).

The spelling of 71470140 in words is "seventy-one million, four hundred seventy thousand, one hundred forty".