71538387 has 8 divisors (see below), whose sum is σ = 95433360. Its totient is φ = 47667840.

The previous prime is 71538377. The next prime is 71538391. The reversal of 71538387 is 78383517.

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

It is not a de Polignac number, because 71538387 - 2¹² = 71534291 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71538377) 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 7 ways as a sum of consecutive naturals, for example, 2439 + ... + 12207.

It is an arithmetic number, because the mean of its divisors is an integer number (11929170).

Almost surely, 2^71538387 is an apocalyptic number.

71538387 is a deficient number, since it is larger than the sum of its proper divisors (23894973).

71538387 is a wasteful number, since it uses less digits than its factorization.

71538387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12213.

The product of its digits is 141120, while the sum is 42.

The square root of 71538387 is about 8458.0368289574. The cubic root of 71538387 is about 415.1257895164.

The spelling of 71538387 in words is "seventy-one million, five hundred thirty-eight thousand, three hundred eighty-seven".