65289540 has 24 divisors (see below), whose sum is σ = 182810880. Its totient is φ = 17410528.

The previous prime is 65289517. The next prime is 65289559. The reversal of 65289540 is 4598256.

65289540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 544020 + ... + 544139.

It is an arithmetic number, because the mean of its divisors is an integer number (7617120).

Almost surely, 2^65289540 is an apocalyptic number.

65289540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65289540 is an abundant number, since it is smaller than the sum of its proper divisors (117521340).

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

65289540 is a wasteful number, since it uses less digits than its factorization.

65289540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088171 (or 1088169 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 65289540 is about 8080.1943045944. The cubic root of 65289540 is about 402.6686972082.

The spelling of 65289540 in words is "sixty-five million, two hundred eighty-nine thousand, five hundred forty".