1971763460 has 24 divisors (see below), whose sum is σ = 4143338136. Its totient is φ = 788203520.

The previous prime is 1971763459. The next prime is 1971763477. The reversal of 1971763460 is 643671791.

It can be written as a sum of positive squares in 4 ways, for example, as 5373124 + 1966390336 = 2318^2 + 44344^2 .

It is a super-2 number, since 2×1971763460² = 7775702284382343200, which contains 22 as substring.

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, 1700 + ... + 62820.

It is an arithmetic number, because the mean of its divisors is an integer number (172639089).

Almost surely, 2^1971763460 is an apocalyptic number.

1971763460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1971763460 is an abundant number, since it is smaller than the sum of its proper divisors (2171574676).

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

1971763460 is a wasteful number, since it uses less digits than its factorization.

1971763460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62743 (or 62741 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 1971763460 is about 44404.5432360248. The cubic root of 1971763460 is about 1253.9636232683.

The spelling of 1971763460 in words is "one billion, nine hundred seventy-one million, seven hundred sixty-three thousand, four hundred sixty".