999672448 has 16 divisors (see below), whose sum is σ = 1991535210. Its totient is φ = 499836160.

The previous prime is 999672433. The next prime is 999672449. The reversal of 999672448 is 844276999.

It can be written as a sum of positive squares in only one way, i.e., 998054464 + 1617984 = 31592^2 + 1272^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 999672392 and 999672401.

It is not an unprimeable number, because it can be changed into a prime (999672449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3904843 + ... + 3905098.

Almost surely, 2^999672448 is an apocalyptic number.

It is an amenable number.

999672448 is a deficient number, since it is larger than the sum of its proper divisors (991862762).

999672448 is an equidigital number, since it uses as much as digits as its factorization.

999672448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7809955 (or 7809943 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 58.

The square root of 999672448 is about 31617.5971256514. The cubic root of 999672448 is about 999.8908040767.

The spelling of 999672448 in words is "nine hundred ninety-nine million, six hundred seventy-two thousand, four hundred forty-eight".