71079138 has 48 divisors (see below), whose sum is σ = 167763960. Its totient is φ = 21618432.

The previous prime is 71079103. The next prime is 71079143. The reversal of 71079138 is 83197017.

It can be written as a sum of positive squares in 4 ways, for example, as 55845729 + 15233409 = 7473^2 + 3903^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19120 + ... + 22532.

Almost surely, 2^71079138 is an apocalyptic number.

71079138 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 71079138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83881980).

71079138 is an abundant number, since it is smaller than the sum of its proper divisors (96684822).

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

71079138 is a wasteful number, since it uses less digits than its factorization.

71079138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3523 (or 3520 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The square root of 71079138 is about 8430.8444416915. The cubic root of 71079138 is about 414.2355657208.

It can be divided in two parts, 71079 and 138, that added together give a palindrome (71217).

The spelling of 71079138 in words is "seventy-one million, seventy-nine thousand, one hundred thirty-eight".