1989534 has 8 divisors (see below), whose sum is σ = 3979080. Its totient is φ = 663176.

The previous prime is 1989517. The next prime is 1989551. The reversal of 1989534 is 4359891.

It is an interprime number because it is at equal distance from previous prime (1989517) and next prime (1989551).

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

1989534 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 1989492 and 1989501.

It is a congruent number.

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, 165789 + ... + 165800.

It is an arithmetic number, because the mean of its divisors is an integer number (497385).

2^1989534 is an apocalyptic number.

1989534 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1989534 is a wasteful number, since it uses less digits than its factorization.

1989534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331594.

The product of its digits is 38880, while the sum is 39.

The square root of 1989534 is about 1410.5084189752. The cubic root of 1989534 is about 125.7719482866.

The spelling of 1989534 in words is "one million, nine hundred eighty-nine thousand, five hundred thirty-four".