1986694368 has 96 divisors (see below), whose sum is σ = 5459602176. Its totient is φ = 631369728.

The previous prime is 1986694363. The next prime is 1986694417. The reversal of 1986694368 is 8634966891.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1986694363) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 764880 + ... + 767472.

It is an arithmetic number, because the mean of its divisors is an integer number (56870856).

Almost surely, 2^1986694368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1986694368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2729801088).

1986694368 is an abundant number, since it is smaller than the sum of its proper divisors (3472907808).

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

1986694368 is a wasteful number, since it uses less digits than its factorization.

1986694368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2976 (or 2968 counting only the distinct ones).

The product of its digits is 13436928, while the sum is 60.

The square root of 1986694368 is about 44572.3498146553. The cubic root of 1986694368 is about 1257.1208232462.

The spelling of 1986694368 in words is "one billion, nine hundred eighty-six million, six hundred ninety-four thousand, three hundred sixty-eight".