39904458707842 has 8 divisors (see below), whose sum is σ = 59856742673532. Its totient is φ = 19952211150000.

The previous prime is 39904458707831. The next prime is 39904458707843. The reversal of 39904458707842 is 24870785440993.

It can be written as a sum of positive squares in 2 ways, for example, as 36089347368481 + 3815111339361 = 6007441^2 + 1953231^2 .

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 (39904458707843) 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, 6173409 + ... + 10859092.

Almost surely, 2^{39904458707842} is an apocalyptic number.

39904458707842 is a deficient number, since it is larger than the sum of its proper divisors (19952283965690).

39904458707842 is a wasteful number, since it uses less digits than its factorization.

39904458707842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18203924.

The product of its (nonzero) digits is 487710720, while the sum is 70.

The spelling of 39904458707842 in words is "thirty-nine trillion, nine hundred four billion, four hundred fifty-eight million, seven hundred seven thousand, eight hundred forty-two".