3957491980 has 48 divisors (see below), whose sum is σ = 9118920384. Its totient is φ = 1433652480.

The previous prime is 3957491957. The next prime is 3957491981. The reversal of 3957491980 is 891947593.

It is not an unprimeable number, because it can be changed into a prime (3957491981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129816 + ... + 157375.

It is an arithmetic number, because the mean of its divisors is an integer number (189977508).

Almost surely, 2^3957491980 is an apocalyptic number.

It is an amenable number.

3957491980 is an abundant number, since it is smaller than the sum of its proper divisors (5161428404).

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

3957491980 is a wasteful number, since it uses less digits than its factorization.

3957491980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287266 (or 287264 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 55.

The square root of 3957491980 is about 62908.6002069669. The cubic root of 3957491980 is about 1581.7579082976.

The spelling of 3957491980 in words is "three billion, nine hundred fifty-seven million, four hundred ninety-one thousand, nine hundred eighty".