68736240 has 60 divisors (see below), whose sum is σ = 230841624. Its totient is φ = 18329472.

The previous prime is 68736229. The next prime is 68736247. The reversal of 68736240 is 4263786.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 68736195 and 68736204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68736247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47014 + ... + 48453.

Almost surely, 2^68736240 is an apocalyptic number.

68736240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68736240 is an abundant number, since it is smaller than the sum of its proper divisors (162105384).

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

68736240 is a wasteful number, since it uses less digits than its factorization.

68736240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95486 (or 95477 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 68736240 is about 8290.7321751459. The cubic root of 68736240 is about 409.6333029054.

The spelling of 68736240 in words is "sixty-eight million, seven hundred thirty-six thousand, two hundred forty".