1977578308 has 12 divisors (see below), whose sum is σ = 3464778240. Its totient is φ = 987641672.

The previous prime is 1977578287. The next prime is 1977578321. The reversal of 1977578308 is 8038757791.

It is a happy number.

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 3 ways as a sum of consecutive naturals, for example, 282988 + ... + 289891.

It is an arithmetic number, because the mean of its divisors is an integer number (288731520).

Almost surely, 2^1977578308 is an apocalyptic number.

It is an amenable number.

1977578308 is a deficient number, since it is larger than the sum of its proper divisors (1487199932).

1977578308 is a wasteful number, since it uses less digits than its factorization.

1977578308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573746 (or 573744 counting only the distinct ones).

The product of its (nonzero) digits is 2963520, while the sum is 55.

The square root of 1977578308 is about 44469.9708567478. The cubic root of 1977578308 is about 1255.1950846715.

The spelling of 1977578308 in words is "one billion, nine hundred seventy-seven million, five hundred seventy-eight thousand, three hundred eight".