1986140739528 has 192 divisors, whose sum is σ = 5986695199680. Its totient is φ = 589731417600.

The previous prime is 1986140739493. The next prime is 1986140739559. The reversal of 1986140739528 is 8259370416891.

1986140739528 is a `hidden beast` number, since 1 + 9 + 8 + 61 + 40 + 7 + 3 + 9 + 528 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32416843 + ... + 32478053.

It is an arithmetic number, because the mean of its divisors is an integer number (31180704165).

It is a 2-persistent number, because it is pandigital, and so is 2⋅1986140739528 = 3972281479056, but 3⋅1986140739528 = 5958422218584 is not.

Almost surely, 2^{1986140739528} is an apocalyptic number.

1986140739528 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1986140739528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2993347599840).

1986140739528 is an abundant number, since it is smaller than the sum of its proper divisors (4000554460152).

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

1986140739528 is a wasteful number, since it uses less digits than its factorization.

1986140739528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62060 (or 62053 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 63.

The spelling of 1986140739528 in words is "one trillion, nine hundred eighty-six billion, one hundred forty million, seven hundred thirty-nine thousand, five hundred twenty-eight".