71780078 has 8 divisors (see below), whose sum is σ = 107722872. Its totient is φ = 35872456.

The previous prime is 71780063. The next prime is 71780087. The reversal of 71780078 is 87008717.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2900 + ... + 12327.

It is an arithmetic number, because the mean of its divisors is an integer number (13465359).

Almost surely, 2^71780078 is an apocalyptic number.

71780078 is a deficient number, since it is larger than the sum of its proper divisors (35942794).

71780078 is a wasteful number, since it uses less digits than its factorization.

71780078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17586.

The product of its (nonzero) digits is 21952, while the sum is 38.

The square root of 71780078 is about 8472.3124352210. The cubic root of 71780078 is about 415.5927620651.

The spelling of 71780078 in words is "seventy-one million, seven hundred eighty thousand, seventy-eight".