1065431040 has 104 divisors (see below), whose sum is σ = 3409159728. Its totient is φ = 284098560.

The previous prime is 1065430997. The next prime is 1065431057. The reversal of 1065431040 is 401345601.

It is a super-2 number, since 2×1065431040² = 2270286601990963200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1065431040.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52770 + ... + 70110.

It is an arithmetic number, because the mean of its divisors is an integer number (32780382).

Almost surely, 2^1065431040 is an apocalyptic number.

1065431040 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 1065431040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1704579864).

1065431040 is an abundant number, since it is smaller than the sum of its proper divisors (2343728688).

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

1065431040 is an equidigital number, since it uses as much as digits as its factorization.

1065431040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17373 (or 17351 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1065431040 is about 32640.9411629015. The cubic root of 1065431040 is about 1021.3512272647.

Adding to 1065431040 its reverse (401345601), we get a palindrome (1466776641).

The spelling of 1065431040 in words is "one billion, sixty-five million, four hundred thirty-one thousand, forty".