3909531960 has 128 divisors (see below), whose sum is σ = 13717728000. Its totient is φ = 987666048.

The previous prime is 3909531959. The next prime is 3909531961. The reversal of 3909531960 is 691359093.

It is an interprime number because it is at equal distance from previous prime (3909531959) and next prime (3909531961).

It is a super-2 number, since 2×3909531960² = 30568880292522883200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3909531961) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74742 + ... + 115781.

It is an arithmetic number, because the mean of its divisors is an integer number (107169750).

Almost surely, 2^3909531960 is an apocalyptic number.

3909531960 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3909531960 is an abundant number, since it is smaller than the sum of its proper divisors (9808196040).

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

3909531960 is a wasteful number, since it uses less digits than its factorization.

3909531960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190562 (or 190552 counting only the distinct ones).

The product of its (nonzero) digits is 196830, while the sum is 45.

The square root of 3909531960 is about 62526.2501674297. The cubic root of 3909531960 is about 1575.3422566860.

The spelling of 3909531960 in words is "three billion, nine hundred nine million, five hundred thirty-one thousand, nine hundred sixty".