999672480 has 144 divisors (see below), whose sum is σ = 3433116960. Its totient is φ = 264881664.

The previous prime is 999672473. The next prime is 999672481. The reversal of 999672480 is 84276999.

999672480 is a `hidden beast` number, since 9 + 9 + 96 + 72 + 480 = 666.

999672480 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (144).

It is not an unprimeable number, because it can be changed into a prime (999672481) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 232591 + ... + 236849.

It is an arithmetic number, because the mean of its divisors is an integer number (23841090).

Almost surely, 2^999672480 is an apocalyptic number.

999672480 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 999672480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1716558480).

999672480 is an abundant number, since it is smaller than the sum of its proper divisors (2433444480).

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

999672480 is a wasteful number, since it uses less digits than its factorization.

999672480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4443 (or 4432 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The square root of 999672480 is about 31617.5976316987. The cubic root of 999672480 is about 999.8908147457.

The spelling of 999672480 in words is "nine hundred ninety-nine million, six hundred seventy-two thousand, four hundred eighty".