71345740 has 48 divisors (see below), whose sum is σ = 154695744. Its totient is φ = 27622400.

The previous prime is 71345723. The next prime is 71345777. The reversal of 71345740 is 4754317.

It is a super-2 number, since 2×71345740² = 10180429232295200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136680 + ... + 137200.

It is an arithmetic number, because the mean of its divisors is an integer number (3222828).

Almost surely, 2^71345740 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 71345740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77347872).

71345740 is an abundant number, since it is smaller than the sum of its proper divisors (83350004).

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

71345740 is a wasteful number, since it uses less digits than its factorization.

71345740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738 (or 736 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 71345740 is about 8446.6407523938. The cubic root of 71345740 is about 414.7528213073.

The spelling of 71345740 in words is "seventy-one million, three hundred forty-five thousand, seven hundred forty".