1988604 has 24 divisors (see below), whose sum is σ = 5155920. Its totient is φ = 662832.

The previous prime is 1988599. The next prime is 1988611. The reversal of 1988604 is 4068891.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9099 + ... + 9314.

It is an arithmetic number, because the mean of its divisors is an integer number (214830).

2^1988604 is an apocalyptic number.

It is an amenable number.

1988604 is an abundant number, since it is smaller than the sum of its proper divisors (3167316).

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

1988604 is a wasteful number, since it uses less digits than its factorization.

1988604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18426 (or 18418 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 1988604 is about 1410.1787120787. The cubic root of 1988604 is about 125.7523480281.

The spelling of 1988604 in words is "one million, nine hundred eighty-eight thousand, six hundred four".