71472340 has 24 divisors (see below), whose sum is σ = 151782120. Its totient is φ = 28267008.

The previous prime is 71472337. The next prime is 71472361. The reversal of 71472340 is 4327417.

It can be written as a sum of positive squares in 4 ways, for example, as 2316484 + 69155856 = 1522^2 + 8316^2 .

It is a junction number, because it is equal to n+sod(n) for n = 71472299 and 71472308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18297 + ... + 21856.

It is an arithmetic number, because the mean of its divisors is an integer number (6324255).

Almost surely, 2^71472340 is an apocalyptic number.

It is an amenable number.

71472340 is an abundant number, since it is smaller than the sum of its proper divisors (80309780).

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

71472340 is a wasteful number, since it uses less digits than its factorization.

71472340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40251 (or 40249 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 71472340 is about 8454.1315343446. The cubic root of 71472340 is about 414.9979967968.

Adding to 71472340 its reverse (4327417), we get a palindrome (75799757).

The spelling of 71472340 in words is "seventy-one million, four hundred seventy-two thousand, three hundred forty".