989145654 has 24 divisors (see below), whose sum is σ = 2301278328. Its totient is φ = 282612960.

The previous prime is 989145637. The next prime is 989145667. The reversal of 989145654 is 456541989.

It is a junction number, because it is equal to n+sod(n) for n = 989145597 and 989145606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1681927 + ... + 1682514.

It is an arithmetic number, because the mean of its divisors is an integer number (95886597).

Almost surely, 2^989145654 is an apocalyptic number.

989145654 is an abundant number, since it is smaller than the sum of its proper divisors (1312132674).

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

989145654 is a wasteful number, since it uses less digits than its factorization.

989145654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3364460 (or 3364453 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 51.

The square root of 989145654 is about 31450.6860656489. The cubic root of 989145654 is about 996.3687143925.

The spelling of 989145654 in words is "nine hundred eighty-nine million, one hundred forty-five thousand, six hundred fifty-four".