989615 has 16 divisors (see below), whose sum is σ = 1365120. Its totient is φ = 681120.

The previous prime is 989581. The next prime is 989623. The reversal of 989615 is 516989.

It is not a de Polignac number, because 989615 - 2¹⁰ = 988591 is a prime.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 989615.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 572 + ... + 1518.

It is an arithmetic number, because the mean of its divisors is an integer number (85320).

2⁹⁸⁹⁶¹⁵ is an apocalyptic number.

989615 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

989615 is a deficient number, since it is larger than the sum of its proper divisors (375505).

989615 is a wasteful number, since it uses less digits than its factorization.

989615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982.

The product of its digits is 19440, while the sum is 38.

The square root of 989615 is about 994.7939485140. The cubic root of 989615 is about 99.6526280579.

The spelling of 989615 in words is "nine hundred eighty-nine thousand, six hundred fifteen".