68453920 has 48 divisors (see below), whose sum is σ = 167310360. Its totient is φ = 26435584.

The previous prime is 68453909. The next prime is 68453923. The reversal of 68453920 is 2935486.

It can be written as a sum of positive squares in 4 ways, for example, as 55175184 + 13278736 = 7428^2 + 3644^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 68453920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68453923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2737 + ... + 12016.

Almost surely, 2^68453920 is an apocalyptic number.

It is an amenable number.

68453920 is an abundant number, since it is smaller than the sum of its proper divisors (98856440).

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

68453920 is a wasteful number, since it uses less digits than its factorization.

68453920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14797 (or 14789 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 68453920 is about 8273.6884156947. The cubic root of 68453920 is about 409.0717050768.

It can be divided in two parts, 6845 and 3920, that multiplied together give a square (26832400 = 5180²).

The spelling of 68453920 in words is "sixty-eight million, four hundred fifty-three thousand, nine hundred twenty".