1288935081 has 48 divisors (see below), whose sum is σ = 2250114048. Its totient is φ = 695347200.

The previous prime is 1288935077. The next prime is 1288935107. The reversal of 1288935081 is 1805398821.

It is a happy number.

It is not a de Polignac number, because 1288935081 - 2² = 1288935077 is a prime.

It is a super-2 number, since 2×1288935081² = 3322707286064953122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1288935001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 72025 + ... + 88121.

It is an arithmetic number, because the mean of its divisors is an integer number (46877376).

Almost surely, 2^1288935081 is an apocalyptic number.

It is an amenable number.

1288935081 is a deficient number, since it is larger than the sum of its proper divisors (961178967).

1288935081 is a wasteful number, since it uses less digits than its factorization.

1288935081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16182 (or 16179 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The square root of 1288935081 is about 35901.7420329432. The cubic root of 1288935081 is about 1088.2876013158.

The spelling of 1288935081 in words is "one billion, two hundred eighty-eight million, nine hundred thirty-five thousand, eighty-one".