1065855390 has 32 divisors (see below), whose sum is σ = 2558994336. Its totient is φ = 284123520.

The previous prime is 1065855389. The next prime is 1065855419. The reversal of 1065855390 is 935585601.

It is a super-2 number, since 2×1065855390² = 2272095424784104200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110980 + ... + 120200.

It is an arithmetic number, because the mean of its divisors is an integer number (79968573).

Almost surely, 2^1065855390 is an apocalyptic number.

1065855390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1065855390 is an abundant number, since it is smaller than the sum of its proper divisors (1493138946).

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

1065855390 is a wasteful number, since it uses less digits than its factorization.

1065855390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13084.

The product of its (nonzero) digits is 162000, while the sum is 42.

The square root of 1065855390 is about 32647.4407879086. The cubic root of 1065855390 is about 1021.4868070907.

The spelling of 1065855390 in words is "one billion, sixty-five million, eight hundred fifty-five thousand, three hundred ninety".