1045638320 has 20 divisors (see below), whose sum is σ = 2431109280. Its totient is φ = 418255296.

The previous prime is 1045638311. The next prime is 1045638323. The reversal of 1045638320 is 238365401.

1045638320 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 (20).

It is not an unprimeable number, because it can be changed into a prime (1045638323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6535160 + ... + 6535319.

It is an arithmetic number, because the mean of its divisors is an integer number (121555464).

Almost surely, 2^1045638320 is an apocalyptic number.

1045638320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1045638320 is an abundant number, since it is smaller than the sum of its proper divisors (1385470960).

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

1045638320 is a wasteful number, since it uses less digits than its factorization.

1045638320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13070492 (or 13070486 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 1045638320 is about 32336.3312699508. The cubic root of 1045638320 is about 1014.9870398824.

The spelling of 1045638320 in words is "one billion, forty-five million, six hundred thirty-eight thousand, three hundred twenty".