3928001387 has 4 divisors (see below), whose sum is σ = 4098784080. Its totient is φ = 3757218696.

The previous prime is 3928001381. The next prime is 3928001411. The reversal of 3928001387 is 7831008293.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7831008293 = 9689 ⋅808237.

It is a cyclic number.

It is not a de Polignac number, because 3928001387 - 2⁸ = 3928001131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3928001381) 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, 85391312 + ... + 85391357.

It is an arithmetic number, because the mean of its divisors is an integer number (1024696020).

Almost surely, 2^3928001387 is an apocalyptic number.

3928001387 is a deficient number, since it is larger than the sum of its proper divisors (170782693).

3928001387 is a wasteful number, since it uses less digits than its factorization.

3928001387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170782692.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 3928001387 is about 62673.7695292058. The cubic root of 3928001387 is about 1577.8191065171.

The spelling of 3928001387 in words is "three billion, nine hundred twenty-eight million, one thousand, three hundred eighty-seven".