1988130 has 16 divisors (see below), whose sum is σ = 4771584. Its totient is φ = 530160.

The previous prime is 1988113. The next prime is 1988137. The reversal of 1988130 is 318891.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 66271 = 1988130 / (1 + 9 + 8 + 8 + 1 + 3 + 0).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1988137) 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, 33106 + ... + 33165.

It is an arithmetic number, because the mean of its divisors is an integer number (298224).

2^1988130 is an apocalyptic number.

1988130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1988130 is an abundant number, since it is smaller than the sum of its proper divisors (2783454).

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

1988130 is a wasteful number, since it uses less digits than its factorization.

1988130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66281.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 1988130 is about 1410.0106382577. The cubic root of 1988130 is about 125.7423558679.

Subtracting from 1988130 its sum of digits (30), we obtain a square (1988100 = 1410²).

The spelling of 1988130 in words is "one million, nine hundred eighty-eight thousand, one hundred thirty".