1071345640 has 16 divisors (see below), whose sum is σ = 2410527780. Its totient is φ = 428538240.

The previous prime is 1071345629. The next prime is 1071345673. The reversal of 1071345640 is 465431701.

It can be written as a sum of positive squares in 2 ways, for example, as 1006285284 + 65060356 = 31722^2 + 8066^2 .

It is a super-2 number, since 2×1071345640² = 2295562960694019200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13391781 + ... + 13391860.

Almost surely, 2^1071345640 is an apocalyptic number.

1071345640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1071345640 is an abundant number, since it is smaller than the sum of its proper divisors (1339182140).

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

1071345640 is a wasteful number, since it uses less digits than its factorization.

1071345640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26783652 (or 26783648 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 1071345640 is about 32731.4167123881. The cubic root of 1071345640 is about 1023.2377062891.

The spelling of 1071345640 in words is "one billion, seventy-one million, three hundred forty-five thousand, six hundred forty".