68402320 has 40 divisors (see below), whose sum is σ = 181756224. Its totient is φ = 23452032.

The previous prime is 68402303. The next prime is 68402353. The reversal of 68402320 is 2320486.

It is a happy number.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60514 + ... + 61633.

Almost surely, 2^68402320 is an apocalyptic number.

It is an amenable number.

68402320 is an abundant number, since it is smaller than the sum of its proper divisors (113353904).

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

68402320 is a wasteful number, since it uses less digits than its factorization.

68402320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122167 (or 122161 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 68402320 is about 8270.5695088065. The cubic root of 68402320 is about 408.9688942813.

The spelling of 68402320 in words is "sixty-eight million, four hundred two thousand, three hundred twenty".