71206340 has 24 divisors (see below), whose sum is σ = 153182232. Its totient is φ = 27787520.

The previous prime is 71206283. The next prime is 71206361. The reversal of 71206340 is 4360217.

It can be written as a sum of positive squares in 4 ways, for example, as 2515396 + 68690944 = 1586^2 + 8288^2 .

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, 42599 + ... + 44238.

It is an arithmetic number, because the mean of its divisors is an integer number (6382593).

Almost surely, 2^71206340 is an apocalyptic number.

It is an amenable number.

71206340 is an abundant number, since it is smaller than the sum of its proper divisors (81975892).

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

71206340 is a wasteful number, since it uses less digits than its factorization.

71206340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86887 (or 86885 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 71206340 is about 8438.3849165584. The cubic root of 71206340 is about 414.4825214059.

Adding to 71206340 its reverse (4360217), we get a palindrome (75566557).

The spelling of 71206340 in words is "seventy-one million, two hundred six thousand, three hundred forty".