1988872 has 8 divisors (see below), whose sum is σ = 3729150. Its totient is φ = 994432.

The previous prime is 1988851. The next prime is 1988887. The reversal of 1988872 is 2788891.

It can be written as a sum of positive squares in only one way, i.e., 1153476 + 835396 = 1074^2 + 914^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-4 number, since 4×1988872⁴ (a number of 26 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124297 + ... + 124312.

2^1988872 is an apocalyptic number.

It is an amenable number.

1988872 is a deficient number, since it is larger than the sum of its proper divisors (1740278).

1988872 is a wasteful number, since it uses less digits than its factorization.

1988872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248615 (or 248611 counting only the distinct ones).

The product of its digits is 64512, while the sum is 43.

The square root of 1988872 is about 1410.2737322945. The cubic root of 1988872 is about 125.7579969013.

The spelling of 1988872 in words is "one million, nine hundred eighty-eight thousand, eight hundred seventy-two".