1986886874 has 8 divisors (see below), whose sum is σ = 3406091808. Its totient is φ = 851522940.

The previous prime is 1986886871. The next prime is 1986886877. The reversal of 1986886874 is 4786886891.

It is an interprime number because it is at equal distance from previous prime (1986886871) and next prime (1986886877).

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

It is a self number, because there is not a number n which added to its sum of digits gives 1986886874.

It is not an unprimeable number, because it can be changed into a prime (1986886871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70960232 + ... + 70960259.

It is an arithmetic number, because the mean of its divisors is an integer number (425761476).

Almost surely, 2^1986886874 is an apocalyptic number.

1986886874 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1986886874 is a deficient number, since it is larger than the sum of its proper divisors (1419204934).

1986886874 is a wasteful number, since it uses less digits than its factorization.

1986886874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141920500.

The product of its digits is 37158912, while the sum is 65.

The square root of 1986886874 is about 44574.5092401476. The cubic root of 1986886874 is about 1257.1614259494.

The spelling of 1986886874 in words is "one billion, nine hundred eighty-six million, eight hundred eighty-six thousand, eight hundred seventy-four".