65188988 has 12 divisors (see below), whose sum is σ = 114370872. Its totient is φ = 32511600.

The previous prime is 65188987. The next prime is 65189023. The reversal of 65188988 is 88988156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65188987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18938 + ... + 22113.

It is an arithmetic number, because the mean of its divisors is an integer number (9530906).

Almost surely, 2^65188988 is an apocalyptic number.

It is an amenable number.

65188988 is a deficient number, since it is larger than the sum of its proper divisors (49181884).

65188988 is a wasteful number, since it uses less digits than its factorization.

65188988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41452 (or 41450 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 53.

The square root of 65188988 is about 8073.9697794827. The cubic root of 65188988 is about 402.4618751745.

The spelling of 65188988 in words is "sixty-five million, one hundred eighty-eight thousand, nine hundred eighty-eight".