1065081920 has 56 divisors (see below), whose sum is σ = 2898550464. Its totient is φ = 365170176.

The previous prime is 1065081893. The next prime is 1065081929. The reversal of 1065081920 is 291805601.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×1065081920² = 2268798992621772800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (1065081929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235502 + ... + 239981.

Almost surely, 2^1065081920 is an apocalyptic number.

1065081920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1065081920 is an abundant number, since it is smaller than the sum of its proper divisors (1833468544).

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

1065081920 is an equidigital number, since it uses as much as digits as its factorization.

1065081920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475507 (or 475497 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 1065081920 is about 32635.5928397203. The cubic root of 1065081920 is about 1021.2396564289.

The spelling of 1065081920 in words is "one billion, sixty-five million, eighty-one thousand, nine hundred twenty".