68453440 has 56 divisors (see below), whose sum is σ = 177832512. Its totient is φ = 24890880.

The previous prime is 68453419. The next prime is 68453449. The reversal of 68453440 is 4435486.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 68453396 and 68453405.

It is not an unprimeable number, because it can be changed into a prime (68453449) 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, 6204 + ... + 13243.

Almost surely, 2^68453440 is an apocalyptic number.

It is an amenable number.

68453440 is an abundant number, since it is smaller than the sum of its proper divisors (109379072).

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

68453440 is a wasteful number, since it uses less digits than its factorization.

68453440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19475 (or 19465 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 34.

The square root of 68453440 is about 8273.6594080250. The cubic root of 68453440 is about 409.0707489354.

The spelling of 68453440 in words is "sixty-eight million, four hundred fifty-three thousand, four hundred forty".