1988515 has 8 divisors (see below), whose sum is σ = 2394000. Its totient is φ = 1585632.

The previous prime is 1988513. The next prime is 1988531. The reversal of 1988515 is 5158891.

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

It is a cyclic number.

It is not a de Polignac number, because 1988515 - 2¹ = 1988513 is a prime.

1988515 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1988513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2097 + ... + 2893.

It is an arithmetic number, because the mean of its divisors is an integer number (299250).

2^1988515 is an apocalyptic number.

1988515 is a deficient number, since it is larger than the sum of its proper divisors (405485).

1988515 is an equidigital number, since it uses as much as digits as its factorization.

1988515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301.

The product of its digits is 14400, while the sum is 37.

The square root of 1988515 is about 1410.1471554416. The cubic root of 1988515 is about 125.7504719841.

It can be divided in two parts, 19885 and 15, that added together give a triangular number (19900 = T₁₉₉).

The spelling of 1988515 in words is "one million, nine hundred eighty-eight thousand, five hundred fifteen".