1038666321 has 48 divisors (see below), whose sum is σ = 1939811328. Its totient is φ = 539557200.

The previous prime is 1038666311. The next prime is 1038666367. The reversal of 1038666321 is 1236668301.

It is not a de Polignac number, because 1038666321 - 2⁷ = 1038666193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1038666311) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9045 + ... + 46466.

It is an arithmetic number, because the mean of its divisors is an integer number (40412736).

Almost surely, 2^1038666321 is an apocalyptic number.

1038666321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1038666321 is a deficient number, since it is larger than the sum of its proper divisors (901145007).

1038666321 is an equidigital number, since it uses as much as digits as its factorization.

1038666321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55544 (or 55532 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 1038666321 is about 32228.3465446181. The cubic root of 1038666321 is about 1012.7261322078.

The spelling of 1038666321 in words is "one billion, thirty-eight million, six hundred sixty-six thousand, three hundred twenty-one".