999634272 has 384 divisors, whose sum is σ = 3511517184. Its totient is φ = 241532928.

The previous prime is 999634241. The next prime is 999634297. The reversal of 999634272 is 272436999.

999634272 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7871073 + ... + 7871199.

It is an arithmetic number, because the mean of its divisors is an integer number (9144576).

Almost surely, 2^999634272 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 999634272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1755758592).

999634272 is an abundant number, since it is smaller than the sum of its proper divisors (2511882912).

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

999634272 is a wasteful number, since it uses less digits than its factorization.

999634272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230 (or 222 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 51.

The square root of 999634272 is about 31616.9934054457. The cubic root of 999634272 is about 999.8780758018.

The spelling of 999634272 in words is "nine hundred ninety-nine million, six hundred thirty-four thousand, two hundred seventy-two".