71057940 has 24 divisors (see below), whose sum is σ = 198962400. Its totient is φ = 18948768.

The previous prime is 71057939. The next prime is 71057941. The reversal of 71057940 is 4975017.

It is an interprime number because it is at equal distance from previous prime (71057939) and next prime (71057941).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71057941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 592090 + ... + 592209.

It is an arithmetic number, because the mean of its divisors is an integer number (8290100).

Almost surely, 2^71057940 is an apocalyptic number.

It is an amenable number.

71057940 is an abundant number, since it is smaller than the sum of its proper divisors (127904460).

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

71057940 is a wasteful number, since it uses less digits than its factorization.

71057940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184311 (or 1184309 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 33.

The square root of 71057940 is about 8429.5871785041. The cubic root of 71057940 is about 414.1943823355.

The spelling of 71057940 in words is "seventy-one million, fifty-seven thousand, nine hundred forty".