1988535 has 16 divisors (see below), whose sum is σ = 3256704. Its totient is φ = 1035552.

The previous prime is 1988533. The next prime is 1988537. The reversal of 1988535 is 5358891.

It is an interprime number because it is at equal distance from previous prime (1988533) and next prime (1988537).

It is not a de Polignac number, because 1988535 - 2¹ = 1988533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1988493 and 1988502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1988531) 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, 897 + ... + 2186.

It is an arithmetic number, because the mean of its divisors is an integer number (203544).

2^1988535 is an apocalyptic number.

1988535 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1988535 is a deficient number, since it is larger than the sum of its proper divisors (1268169).

1988535 is a wasteful number, since it uses less digits than its factorization.

1988535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3134.

The product of its digits is 43200, while the sum is 39.

The square root of 1988535 is about 1410.1542468822. The cubic root of 1988535 is about 125.7508935719.

The spelling of 1988535 in words is "one million, nine hundred eighty-eight thousand, five hundred thirty-five".