3928575491 has 4 divisors (see below), whose sum is σ = 3942758352. Its totient is φ = 3914392632.

The previous prime is 3928575481. The next prime is 3928575499. The reversal of 3928575491 is 1945758293.

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 3928575491 - 2²⁶ = 3861466627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3928575499) 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, 7091015 + ... + 7091568.

It is an arithmetic number, because the mean of its divisors is an integer number (985689588).

Almost surely, 2^3928575491 is an apocalyptic number.

3928575491 is a deficient number, since it is larger than the sum of its proper divisors (14182861).

3928575491 is a wasteful number, since it uses less digits than its factorization.

3928575491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14182860.

The product of its digits is 2721600, while the sum is 53.

The square root of 3928575491 is about 62678.3494597616. The cubic root of 3928575491 is about 1577.8959724211.

The spelling of 3928575491 in words is "three billion, nine hundred twenty-eight million, five hundred seventy-five thousand, four hundred ninety-one".