71880538 has 8 divisors (see below), whose sum is σ = 107882388. Its totient is φ = 35919744.

The previous prime is 71880533. The next prime is 71880541. The reversal of 71880538 is 83508817.

It can be written as a sum of positive squares in 2 ways, for example, as 70610409 + 1270129 = 8403^2 + 1127^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 71880538.

It is not an unprimeable number, because it can be changed into a prime (71880533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5431 + ... + 13162.

Almost surely, 2^71880538 is an apocalyptic number.

71880538 is a deficient number, since it is larger than the sum of its proper divisors (36001850).

71880538 is a wasteful number, since it uses less digits than its factorization.

71880538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20528.

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 71880538 is about 8478.2390860367. The cubic root of 71880538 is about 415.7865530066.

The spelling of 71880538 in words is "seventy-one million, eight hundred eighty thousand, five hundred thirty-eight".