71739438 has 32 divisors (see below), whose sum is σ = 150135552. Its totient is φ = 22809600.

The previous prime is 71739431. The next prime is 71739449. The reversal of 71739438 is 83493717.

It is a self number, because there is not a number n which added to its sum of digits gives 71739438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71739431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88053 + ... + 88863.

It is an arithmetic number, because the mean of its divisors is an integer number (4691736).

Almost surely, 2^71739438 is an apocalyptic number.

71739438 is an abundant number, since it is smaller than the sum of its proper divisors (78396114).

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

71739438 is a wasteful number, since it uses less digits than its factorization.

71739438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1480.

The product of its digits is 127008, while the sum is 42.

The square root of 71739438 is about 8469.9136949558. The cubic root of 71739438 is about 415.5143146796.

The spelling of 71739438 in words is "seventy-one million, seven hundred thirty-nine thousand, four hundred thirty-eight".