39954706394 has 8 divisors (see below), whose sum is σ = 61393817268. Its totient is φ = 19490100640.

The previous prime is 39954706391. The next prime is 39954706423. The reversal of 39954706394 is 49360745993.

It can be written as a sum of positive squares in 2 ways, for example, as 39795063169 + 159643225 = 199487^2 + 12635^2 .

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

It is not an unprimeable number, because it can be changed into a prime (39954706391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243626177 + ... + 243626340.

Almost surely, 2^39954706394 is an apocalyptic number.

39954706394 is a deficient number, since it is larger than the sum of its proper divisors (21439110874).

39954706394 is a wasteful number, since it uses less digits than its factorization.

39954706394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487252560.

The product of its (nonzero) digits is 22044960, while the sum is 59.

The spelling of 39954706394 in words is "thirty-nine billion, nine hundred fifty-four million, seven hundred six thousand, three hundred ninety-four".