39494855440 has 20 divisors (see below), whose sum is σ = 91825539084. Its totient is φ = 15797942144.

The previous prime is 39494855429. The next prime is 39494855453. The reversal of 39494855440 is 4455849493.

It can be written as a sum of positive squares in 2 ways, for example, as 30846599424 + 8648256016 = 175632^2 + 92996^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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, 246842767 + ... + 246842926.

Almost surely, 2^39494855440 is an apocalyptic number.

It is an amenable number.

39494855440 is an abundant number, since it is smaller than the sum of its proper divisors (52330683644).

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

39494855440 is a wasteful number, since it uses less digits than its factorization.

39494855440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493685706 (or 493685700 counting only the distinct ones).

The product of its (nonzero) digits is 12441600, while the sum is 55.

The spelling of 39494855440 in words is "thirty-nine billion, four hundred ninety-four million, eight hundred fifty-five thousand, four hundred forty".