68875440 has 40 divisors (see below), whose sum is σ = 213514608. Its totient is φ = 18366720.

The previous prime is 68875423. The next prime is 68875447. The reversal of 68875440 is 4457886.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 68875392 and 68875401.

It is not an unprimeable number, because it can be changed into a prime (68875447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143251 + ... + 143730.

Almost surely, 2^68875440 is an apocalyptic number.

68875440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68875440 is an abundant number, since it is smaller than the sum of its proper divisors (144639168).

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

68875440 is a wasteful number, since it uses less digits than its factorization.

68875440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286997 (or 286991 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 42.

The square root of 68875440 is about 8299.1228452168. The cubic root of 68875440 is about 409.9096370359.

The spelling of 68875440 in words is "sixty-eight million, eight hundred seventy-five thousand, four hundred forty".