3947628475 has 24 divisors (see below), whose sum is σ = 5645705120. Its totient is φ = 2682097920.

The previous prime is 3947628473. The next prime is 3947628491. The reversal of 3947628475 is 5748267493.

It is not a de Polignac number, because 3947628475 - 2¹ = 3947628473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3947628473) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 84402 + ... + 122551.

Almost surely, 2^3947628475 is an apocalyptic number.

3947628475 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

3947628475 is a deficient number, since it is larger than the sum of its proper divisors (1698076645).

3947628475 is a wasteful number, since it uses less digits than its factorization.

3947628475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207079 (or 207074 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 55.

The square root of 3947628475 is about 62830.1557773017. The cubic root of 3947628475 is about 1580.4427102907.

The spelling of 3947628475 in words is "three billion, nine hundred forty-seven million, six hundred twenty-eight thousand, four hundred seventy-five".