1065993240 has 128 divisors (see below), whose sum is σ = 3509231040. Its totient is φ = 257427456.

The previous prime is 1065993221. The next prime is 1065993329. The reversal of 1065993240 is 423995601.

It is a super-2 number, since 2×1065993240² = 2272683175451395200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

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, 76234 + ... + 89126.

Almost surely, 2^1065993240 is an apocalyptic number.

1065993240 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 1065993240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1754615520).

1065993240 is an abundant number, since it is smaller than the sum of its proper divisors (2443237800).

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

1065993240 is a wasteful number, since it uses less digits than its factorization.

1065993240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12973 (or 12969 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 1065993240 is about 32649.5519111672. The cubic root of 1065993240 is about 1021.5308424222.

The spelling of 1065993240 in words is "one billion, sixty-five million, nine hundred ninety-three thousand, two hundred forty".