989149860 has 192 divisors, whose sum is σ = 3264522240. Its totient is φ = 248209920.

The previous prime is 989149859. The next prime is 989149871. The reversal of 989149860 is 68941989.

989149860 is a `hidden beast` number, since 9 + 8 + 91 + 498 + 60 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 989149797 and 989149806.

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 63 ways as a sum of consecutive naturals, for example, 618582 + ... + 620178.

It is an arithmetic number, because the mean of its divisors is an integer number (17002720).

Almost surely, 2^989149860 is an apocalyptic number.

989149860 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 989149860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1632261120).

989149860 is an abundant number, since it is smaller than the sum of its proper divisors (2275372380).

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

989149860 is a wasteful number, since it uses less digits than its factorization.

989149860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1683 (or 1675 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The square root of 989149860 is about 31450.7529321636. The cubic root of 989149860 is about 996.3701266284.

The spelling of 989149860 in words is "nine hundred eighty-nine million, one hundred forty-nine thousand, eight hundred sixty".