71439396 has 48 divisors (see below), whose sum is σ = 191753856. Its totient is φ = 20277504.

The previous prime is 71439337. The next prime is 71439413. The reversal of 71439396 is 69393417.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10480 + ... + 15896.

It is an arithmetic number, because the mean of its divisors is an integer number (3994872).

Almost surely, 2^71439396 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71439396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95876928).

71439396 is an abundant number, since it is smaller than the sum of its proper divisors (120314460).

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

71439396 is a wasteful number, since it uses less digits than its factorization.

71439396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5588 (or 5586 counting only the distinct ones).

The product of its digits is 122472, while the sum is 42.

The square root of 71439396 is about 8452.1829133071. The cubic root of 71439396 is about 414.9342248298.

The spelling of 71439396 in words is "seventy-one million, four hundred thirty-nine thousand, three hundred ninety-six".