1989370 has 8 divisors (see below), whose sum is σ = 3580884. Its totient is φ = 795744.

The previous prime is 1989353. The next prime is 1989401. The reversal of 1989370 is 739891.

It can be written as a sum of positive squares in 2 ways, for example, as 1962801 + 26569 = 1401^2 + 163^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99459 + ... + 99478.

2^1989370 is an apocalyptic number.

1989370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1989370 is a deficient number, since it is larger than the sum of its proper divisors (1591514).

1989370 is a wasteful number, since it uses less digits than its factorization.

1989370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198944.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 1989370 is about 1410.4502827112. The cubic root of 1989370 is about 125.7684923406.

The spelling of 1989370 in words is "one million, nine hundred eighty-nine thousand, three hundred seventy".