1971281088 has 84 divisors (see below), whose sum is σ = 6457523280. Its totient is φ = 563222016.

The previous prime is 1971281047. The next prime is 1971281111. The reversal of 1971281088 is 8801821791.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (84).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 240423 + ... + 248486.

Almost surely, 2^1971281088 is an apocalyptic number.

1971281088 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1971281088 is an abundant number, since it is smaller than the sum of its proper divisors (4486242192).

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

1971281088 is a wasteful number, since it uses less digits than its factorization.

1971281088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488934 (or 488921 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 45.

The square root of 1971281088 is about 44399.1113424582. Note that the first 3 decimals coincide. The cubic root of 1971281088 is about 1253.8613584200.

The spelling of 1971281088 in words is "one billion, nine hundred seventy-one million, two hundred eighty-one thousand, eighty-eight".