1977908706 has 24 divisors (see below), whose sum is σ = 4444191024. Its totient is φ = 659302740.

The previous prime is 1977908693. The next prime is 1977908753. The reversal of 1977908706 is 6078097791.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2034400 + ... + 2035371.

It is an arithmetic number, because the mean of its divisors is an integer number (185174626).

Almost surely, 2^1977908706 is an apocalyptic number.

1977908706 is an abundant number, since it is smaller than the sum of its proper divisors (2466282318).

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

1977908706 is an equidigital number, since it uses as much as digits as its factorization.

1977908706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4069788 (or 4069776 counting only the distinct ones).

The product of its (nonzero) digits is 1333584, while the sum is 54.

The square root of 1977908706 is about 44473.6855454998. The cubic root of 1977908706 is about 1255.2649834378.

The spelling of 1977908706 in words is "one billion, nine hundred seventy-seven million, nine hundred eight thousand, seven hundred six".