3928202379987 has 4 divisors (see below), whose sum is σ = 5237603173320. Its totient is φ = 2618801586656.

The previous prime is 3928202379943. The next prime is 3928202379989. The reversal of 3928202379987 is 7899732028293.

3928202379987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3928202379987 - 2¹⁶ = 3928202314451 is a prime.

It is a super-2 number, since 2×3928202379987² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3928202379989) 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, 654700396662 + ... + 654700396667.

It is an arithmetic number, because the mean of its divisors is an integer number (1309400793330).

Almost surely, 2^{3928202379987} is an apocalyptic number.

3928202379987 is a deficient number, since it is larger than the sum of its proper divisors (1309400793333).

3928202379987 is a wasteful number, since it uses less digits than its factorization.

3928202379987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1309400793332.

The product of its (nonzero) digits is 164602368, while the sum is 69.

The spelling of 3928202379987 in words is "three trillion, nine hundred twenty-eight billion, two hundred two million, three hundred seventy-nine thousand, nine hundred eighty-seven".