1977539108 has 24 divisors (see below), whose sum is σ = 3525295200. Its totient is φ = 970368768.

The previous prime is 1977539107. The next prime is 1977539129. The reversal of 1977539108 is 8019357791.

It is not an unprimeable number, because it can be changed into a prime (1977539107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139316 + ... + 152852.

It is an arithmetic number, because the mean of its divisors is an integer number (146887300).

Almost surely, 2^1977539108 is an apocalyptic number.

It is an amenable number.

1977539108 is a deficient number, since it is larger than the sum of its proper divisors (1547756092).

1977539108 is a wasteful number, since it uses less digits than its factorization.

1977539108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14219 (or 14217 counting only the distinct ones).

The product of its (nonzero) digits is 476280, while the sum is 50.

The square root of 1977539108 is about 44469.5301077041. The cubic root of 1977539108 is about 1255.1867910307.

The spelling of 1977539108 in words is "one billion, nine hundred seventy-seven million, five hundred thirty-nine thousand, one hundred eight".