68453784 has 72 divisors (see below), whose sum is σ = 215675460. Its totient is φ = 19557216.

The previous prime is 68453783. The next prime is 68453813. The reversal of 68453784 is 48735486.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68453783) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6174 + ... + 13229.

Almost surely, 2^68453784 is an apocalyptic number.

It is an amenable number.

68453784 is an abundant number, since it is smaller than the sum of its proper divisors (147221676).

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

68453784 is a wasteful number, since it uses less digits than its factorization.

68453784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19429 (or 19415 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 68453784 is about 8273.6801968652. The cubic root of 68453784 is about 409.0714341705.

The spelling of 68453784 in words is "sixty-eight million, four hundred fifty-three thousand, seven hundred eighty-four".