1986686472 has 16 divisors (see below), whose sum is σ = 4966716240. Its totient is φ = 662228816.

The previous prime is 1986686461. The next prime is 1986686489. The reversal of 1986686472 is 2746866891.

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, 41389278 + ... + 41389325.

It is an arithmetic number, because the mean of its divisors is an integer number (310419765).

Almost surely, 2^1986686472 is an apocalyptic number.

1986686472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1986686472 is an abundant number, since it is smaller than the sum of its proper divisors (2980029768).

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

1986686472 is a wasteful number, since it uses less digits than its factorization.

1986686472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82778612 (or 82778608 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 57.

The square root of 1986686472 is about 44572.2612394749. The cubic root of 1986686472 is about 1257.1191577931.

The spelling of 1986686472 in words is "one billion, nine hundred eighty-six million, six hundred eighty-six thousand, four hundred seventy-two".