1985388 has 12 divisors (see below), whose sum is σ = 4632600. Its totient is φ = 661792.

The previous prime is 1985377. The next prime is 1985407. The reversal of 1985388 is 8835891.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82713 + ... + 82736.

It is an arithmetic number, because the mean of its divisors is an integer number (386050).

2^1985388 is an apocalyptic number.

It is an amenable number.

1985388 is an abundant number, since it is smaller than the sum of its proper divisors (2647212).

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

1985388 is a wasteful number, since it uses less digits than its factorization.

1985388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165456 (or 165454 counting only the distinct ones).

The product of its digits is 69120, while the sum is 42.

The square root of 1985388 is about 1409.0379696800. The cubic root of 1985388 is about 125.6845219286.

The spelling of 1985388 in words is "one million, nine hundred eighty-five thousand, three hundred eighty-eight".