71278326 has 64 divisors (see below), whose sum is σ = 182914560. Its totient is φ = 20152800.

The previous prime is 71278321. The next prime is 71278327. The reversal of 71278326 is 62387217.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71278321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37245 + ... + 39111.

It is an arithmetic number, because the mean of its divisors is an integer number (2858040).

Almost surely, 2^71278326 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71278326, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91457280).

71278326 is an abundant number, since it is smaller than the sum of its proper divisors (111636234).

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

71278326 is a wasteful number, since it uses less digits than its factorization.

71278326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1986 (or 1980 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 71278326 is about 8442.6492287670. The cubic root of 71278326 is about 414.6221479704.

The spelling of 71278326 in words is "seventy-one million, two hundred seventy-eight thousand, three hundred twenty-six".