8449980 has 192 divisors, whose sum is σ = 30965760. Its totient is φ = 1670400.

The previous prime is 8449979. The next prime is 8449999. The reversal of 8449980 is 899448.

8449980 = T₉₂ + T₉₃ + ... + T₃₇₁.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

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 63 ways as a sum of consecutive naturals, for example, 143191 + ... + 143249.

It is an arithmetic number, because the mean of its divisors is an integer number (161280).

Almost surely, 2^8449980 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8449980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15482880).

8449980 is an abundant number, since it is smaller than the sum of its proper divisors (22515780).

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

8449980 is a wasteful number, since it uses less digits than its factorization.

8449980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 8449980 is about 2906.8849306431. The cubic root of 8449980 is about 203.6816449290.

The spelling of 8449980 in words is "eight million, four hundred forty-nine thousand, nine hundred eighty".