40447228778 has 48 divisors (see below), whose sum is σ = 67086085248. Its totient is φ = 18275690400.

The previous prime is 40447228769. The next prime is 40447228799. The reversal of 40447228778 is 87782274404.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49145675 + ... + 49146497.

It is an arithmetic number, because the mean of its divisors is an integer number (1397626776).

Almost surely, 2^40447228778 is an apocalyptic number.

40447228778 is a deficient number, since it is larger than the sum of its proper divisors (26638856470).

40447228778 is a wasteful number, since it uses less digits than its factorization.

40447228778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1811 (or 1800 counting only the distinct ones).

The product of its (nonzero) digits is 5619712, while the sum is 53.

The spelling of 40447228778 in words is "forty billion, four hundred forty-seven million, two hundred twenty-eight thousand, seven hundred seventy-eight".