39396987996804 has 81 divisors (see below), whose sum is σ = 103142133459183. Its totient is φ = 12679138894464.

The previous prime is 39396987996761. The next prime is 39396987996829. The reversal of 39396987996804 is 40869978969393.

The square root of 39396987996804 is 6276702.

It is a perfect power (a square), and thus also a powerful number.

39396987996804 is a `hidden beast` number, since 3 + 9 + 396 + 98 + 79 + 9 + 68 + 0 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 9880020562500 + 29516967434304 = 3143250^2 + 5432952^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1092128112 + ... + 1092164184.

Almost surely, 2^{39396987996804} is an apocalyptic number.

39396987996804 is the 6276702-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39396987996804

39396987996804 is an abundant number, since it is smaller than the sum of its proper divisors (63745145462379).

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

39396987996804 is an frugal number, since it uses more digits than its factorization.

39396987996804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72214 (or 36107 counting only the distinct ones).

The product of its (nonzero) digits is 34284321792, while the sum is 90.

The spelling of 39396987996804 in words is "thirty-nine trillion, three hundred ninety-six billion, nine hundred eighty-seven million, nine hundred ninety-six thousand, eight hundred four".