71880345 has 16 divisors (see below), whose sum is σ = 127787520. Its totient is φ = 38336112.

The previous prime is 71880337. The next prime is 71880371. The reversal of 71880345 is 54308817.

It is not a de Polignac number, because 71880345 - 2³ = 71880337 is a prime.

It is a Curzon number.

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, 266089 + ... + 266358.

It is an arithmetic number, because the mean of its divisors is an integer number (7986720).

Almost surely, 2^71880345 is an apocalyptic number.

It is an amenable number.

71880345 is a deficient number, since it is larger than the sum of its proper divisors (55907175).

71880345 is a wasteful number, since it uses less digits than its factorization.

71880345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532461 (or 532455 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 71880345 is about 8478.2277039485. The cubic root of 71880345 is about 415.7861808758.

The spelling of 71880345 in words is "seventy-one million, eight hundred eighty thousand, three hundred forty-five".