71348778 has 24 divisors (see below), whose sum is σ = 155722788. Its totient is φ = 23608512.

The previous prime is 71348749. The next prime is 71348791. The reversal of 71348778 is 87784317.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 71115489 + 233289 = 8433^2 + 483^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12001 + ... + 16932.

Almost surely, 2^71348778 is an apocalyptic number.

71348778 is an abundant number, since it is smaller than the sum of its proper divisors (84374010).

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

71348778 is a wasteful number, since it uses less digits than its factorization.

71348778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29078 (or 29075 counting only the distinct ones).

The product of its digits is 263424, while the sum is 45.

The square root of 71348778 is about 8446.8205852853. The cubic root of 71348778 is about 414.7587081395.

The spelling of 71348778 in words is "seventy-one million, three hundred forty-eight thousand, seven hundred seventy-eight".