1986697422 has 16 divisors (see below), whose sum is σ = 4414883280. Its totient is φ = 662232456.

The previous prime is 1986697397. The next prime is 1986697439. The reversal of 1986697422 is 2247966891.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 36790693 = 1986697422 / (1 + 9 + 8 + 6 + 6 + 9 + 7 + 4 + 2 + 2).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18395293 + ... + 18395400.

It is an arithmetic number, because the mean of its divisors is an integer number (275930205).

Almost surely, 2^1986697422 is an apocalyptic number.

1986697422 is an abundant number, since it is smaller than the sum of its proper divisors (2428185858).

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

1986697422 is a wasteful number, since it uses less digits than its factorization.

1986697422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36790704 (or 36790698 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 1986697422 is about 44572.3840735494. The cubic root of 1986697422 is about 1257.1214674059.

The spelling of 1986697422 in words is "one billion, nine hundred eighty-six million, six hundred ninety-seven thousand, four hundred twenty-two".