39450242778 has 16 divisors (see below), whose sum is σ = 78903977376. Its totient is φ = 13149498960.

The previous prime is 39450242761. The next prime is 39450242813. The reversal of 39450242778 is 87724205493.

It is a self number, because there is not a number n which added to its sum of digits gives 39450242778.

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, 15000 + ... + 281292.

It is an arithmetic number, because the mean of its divisors is an integer number (4931498586).

Almost surely, 2^39450242778 is an apocalyptic number.

39450242778 is an abundant number, since it is smaller than the sum of its proper divisors (39453734598).

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

39450242778 is a wasteful number, since it uses less digits than its factorization.

39450242778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290989.

The product of its (nonzero) digits is 3386880, while the sum is 51.

The spelling of 39450242778 in words is "thirty-nine billion, four hundred fifty million, two hundred forty-two thousand, seven hundred seventy-eight".