1998877 has 8 divisors (see below), whose sum is σ = 2128896. Its totient is φ = 1870272.

The previous prime is 1998839. The next prime is 1998881. The reversal of 1998877 is 7788991.

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

It is not a de Polignac number, because 1998877 - 2¹¹ = 1996829 is a prime.

It is a super-2 number, since 2×1998877² = 7991018522258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1998877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5028 + ... + 5410.

It is an arithmetic number, because the mean of its divisors is an integer number (266112).

2^1998877 is an apocalyptic number.

1998877 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1998877 is a deficient number, since it is larger than the sum of its proper divisors (130019).

1998877 is a wasteful number, since it uses less digits than its factorization.

1998877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707.

The product of its digits is 254016, while the sum is 49.

The square root of 1998877 is about 1413.8164661653. The cubic root of 1998877 is about 125.9685190521.

The spelling of 1998877 in words is "one million, nine hundred ninety-eight thousand, eight hundred seventy-seven".