71693740 has 24 divisors (see below), whose sum is σ = 152374320. Its totient is φ = 28331328.

The previous prime is 71693723. The next prime is 71693747. The reversal of 71693740 is 4739617.

71693740 = 191² + 192² + ... + 605².

It is a self number, because there is not a number n which added to its sum of digits gives 71693740.

It is not an unprimeable number, because it can be changed into a prime (71693747) 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, 19935 + ... + 23254.

It is an arithmetic number, because the mean of its divisors is an integer number (6348930).

Almost surely, 2^71693740 is an apocalyptic number.

It is an amenable number.

71693740 is an abundant number, since it is smaller than the sum of its proper divisors (80680580).

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

71693740 is a wasteful number, since it uses less digits than its factorization.

71693740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43281 (or 43279 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 71693740 is about 8467.2155990030. The cubic root of 71693740 is about 415.4260684423.

The spelling of 71693740 in words is "seventy-one million, six hundred ninety-three thousand, seven hundred forty".