6488989040 has 20 divisors (see below), whose sum is σ = 15086899704. Its totient is φ = 2595595584.

The previous prime is 6488989027. The next prime is 6488989051. The reversal of 6488989040 is 409898846.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×6488989040² = 84213957522480243200, which contains 22 as substring.

It is a congruent number.

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, 40556102 + ... + 40556261.

Almost surely, 2^6488989040 is an apocalyptic number.

It is an amenable number.

6488989040 is an abundant number, since it is smaller than the sum of its proper divisors (8597910664).

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

6488989040 is a wasteful number, since it uses less digits than its factorization.

6488989040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81112376 (or 81112370 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 56.

The square root of 6488989040 is about 80554.2614639350. The cubic root of 6488989040 is about 1865.2011743112.

The spelling of 6488989040 in words is "six billion, four hundred eighty-eight million, nine hundred eighty-nine thousand, forty".