3945867975 has 72 divisors (see below), whose sum is σ = 8087339520. Its totient is φ = 1801546560.

The previous prime is 3945867973. The next prime is 3945867979. The reversal of 3945867975 is 5797685493.

3945867975 is a `hidden beast` number, since 39 + 458 + 67 + 97 + 5 = 666.

It is not a de Polignac number, because 3945867975 - 2¹ = 3945867973 is a prime.

It is a super-2 number, since 2×3945867975² = 31139748152261201250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3945867973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2454622 + ... + 2456228.

It is an arithmetic number, because the mean of its divisors is an integer number (112324160).

Almost surely, 2^3945867975 is an apocalyptic number.

3945867975 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

3945867975 is an abundant number, since it is smaller than the sum of its proper divisors (4141471545).

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

3945867975 is a wasteful number, since it uses less digits than its factorization.

3945867975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3189 (or 3181 counting only the distinct ones).

The product of its digits is 57153600, while the sum is 63.

The square root of 3945867975 is about 62816.1442226439. The cubic root of 3945867975 is about 1580.2077351975.

The spelling of 3945867975 in words is "three billion, nine hundred forty-five million, eight hundred sixty-seven thousand, nine hundred seventy-five".