1065000000 has 224 divisors, whose sum is σ = 3571865856. Its totient is φ = 280000000.

The previous prime is 1064999987. The next prime is 1065000043. The reversal of 1065000000 is 5601.

It is a super-2 number, since 2×1065000000² = 2268450000000000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 1065000000.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14999965 + ... + 15000035.

Almost surely, 2^1065000000 is an apocalyptic number.

1065000000 is a gapful number since it is divisible by the number (10) 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 1065000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1785932928).

1065000000 is an abundant number, since it is smaller than the sum of its proper divisors (2506865856).

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

1065000000 is an frugal number, since it uses more digits than its factorization.

1065000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 81 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 1065000000 is about 32634.3377441614. The cubic root of 1065000000 is about 1021.2134731229.

Adding to 1065000000 its reverse (5601), we get a palindrome (1065005601).

The spelling of 1065000000 in words is "one billion, sixty-five million", and thus it is an aban number and an uban number.