71778896 has 40 divisors (see below), whose sum is σ = 168292800. Its totient is φ = 28952064.

The previous prime is 71778887. The next prime is 71778923. The reversal of 71778896 is 69887717.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16946 + ... + 20753.

It is an arithmetic number, because the mean of its divisors is an integer number (4207320).

Almost surely, 2^71778896 is an apocalyptic number.

It is an amenable number.

71778896 is an abundant number, since it is smaller than the sum of its proper divisors (96513904).

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

71778896 is a wasteful number, since it uses less digits than its factorization.

71778896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37731 (or 37725 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 53.

The square root of 71778896 is about 8472.2426782995. The cubic root of 71778896 is about 415.5904808688.

The spelling of 71778896 in words is "seventy-one million, seven hundred seventy-eight thousand, eight hundred ninety-six".