1977056386 has 8 divisors (see below), whose sum is σ = 2978535420. Its totient is φ = 984211248.

The previous prime is 1977056377. The next prime is 1977056399. The reversal of 1977056386 is 6836507791.

It can be written as a sum of positive squares in 2 ways, for example, as 1692088225 + 284968161 = 41135^2 + 16881^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2157901 + ... + 2158816.

Almost surely, 2^1977056386 is an apocalyptic number.

1977056386 is a deficient number, since it is larger than the sum of its proper divisors (1001479034).

1977056386 is a wasteful number, since it uses less digits than its factorization.

1977056386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4316948.

The product of its (nonzero) digits is 1905120, while the sum is 52.

The square root of 1977056386 is about 44464.1022174068. The cubic root of 1977056386 is about 1255.0846513590.

The spelling of 1977056386 in words is "one billion, nine hundred seventy-seven million, fifty-six thousand, three hundred eighty-six".