71351040 has 144 divisors (see below), whose sum is σ = 241502688. Its totient is φ = 17891328.

The previous prime is 71350999. The next prime is 71351041. The reversal of 71351040 is 4015317.

It is a junction number, because it is equal to n+sod(n) for n = 71350998 and 71351016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71351041) 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, 64734 + ... + 65826.

It is an arithmetic number, because the mean of its divisors is an integer number (1677102).

Almost surely, 2^71351040 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 71351040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120751344).

71351040 is an abundant number, since it is smaller than the sum of its proper divisors (170151648).

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

71351040 is a wasteful number, since it uses less digits than its factorization.

71351040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134 (or 1120 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 71351040 is about 8446.9544807581. The cubic root of 71351040 is about 414.7630911824.

Adding to 71351040 its reverse (4015317), we get a palindrome (75366357).

The spelling of 71351040 in words is "seventy-one million, three hundred fifty-one thousand, forty".