1986477970 has 16 divisors (see below), whose sum is σ = 3576788928. Its totient is φ = 794340400.

The previous prime is 1986477959. The next prime is 1986478037. The reversal of 1986477970 is 797746891.

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 7 ways as a sum of consecutive naturals, for example, 3795 + ... + 63145.

It is an arithmetic number, because the mean of its divisors is an integer number (223549308).

Almost surely, 2^1986477970 is an apocalyptic number.

1986477970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1986477970 is a deficient number, since it is larger than the sum of its proper divisors (1590310958).

1986477970 is a wasteful number, since it uses less digits than its factorization.

1986477970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62705.

The product of its (nonzero) digits is 5334336, while the sum is 58.

The square root of 1986477970 is about 44569.9222570558. The cubic root of 1986477970 is about 1257.0751781932.

It can be divided in two parts, 19864779 and 70, that added together give a square (19864849 = 4457²).

The spelling of 1986477970 in words is "one billion, nine hundred eighty-six million, four hundred seventy-seven thousand, nine hundred seventy".