1071996520 has 48 divisors (see below), whose sum is σ = 2805791940. Its totient is φ = 367540992.

The previous prime is 1071996491. The next prime is 1071996521. The reversal of 1071996520 is 256991701.

It can be written as a sum of positive squares in 2 ways, for example, as 891739044 + 180257476 = 29862^2 + 13426^2 .

It is a super-2 number, since 2×1071996520² = 2298353077784220800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (1071996521) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 271509 + ... + 275428.

Almost surely, 2^1071996520 is an apocalyptic number.

1071996520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1071996520 is an abundant number, since it is smaller than the sum of its proper divisors (1733795420).

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

1071996520 is a wasteful number, since it uses less digits than its factorization.

1071996520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546962 (or 546951 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 40.

The square root of 1071996520 is about 32741.3579437384. The cubic root of 1071996520 is about 1023.4448819210. Note that the first 3 decimals are identical.

The spelling of 1071996520 in words is "one billion, seventy-one million, nine hundred ninety-six thousand, five hundred twenty".