1989130 has 48 divisors (see below), whose sum is σ = 4269024. Its totient is φ = 661440.

The previous prime is 1989107. The next prime is 1989131. The reversal of 1989130 is 319891.

It is a junction number, because it is equal to n+sod(n) for n = 1989092 and 1989101.

It is not an unprimeable number, because it can be changed into a prime (1989131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18537 + ... + 18643.

It is an arithmetic number, because the mean of its divisors is an integer number (88938).

2^1989130 is an apocalyptic number.

1989130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1989130 is an abundant number, since it is smaller than the sum of its proper divisors (2279894).

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

1989130 is a wasteful number, since it uses less digits than its factorization.

1989130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 1989130 is about 1410.3652009320. The cubic root of 1989130 is about 125.7634345162.

The spelling of 1989130 in words is "one million, nine hundred eighty-nine thousand, one hundred thirty".