68634240 has 64 divisors (see below), whose sum is σ = 218777760. Its totient is φ = 18301952.

The previous prime is 68634239. The next prime is 68634257. The reversal of 68634240 is 4243686.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15954 + ... + 19793.

Almost surely, 2^68634240 is an apocalyptic number.

68634240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68634240 is an abundant number, since it is smaller than the sum of its proper divisors (150143520).

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

68634240 is a wasteful number, since it uses less digits than its factorization.

68634240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35769 (or 35757 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 68634240 is about 8284.5784443145. The cubic root of 68634240 is about 409.4305797544.

The spelling of 68634240 in words is "sixty-eight million, six hundred thirty-four thousand, two hundred forty".