68646020 has 24 divisors (see below), whose sum is σ = 145483800. Its totient is φ = 27205632.

The previous prime is 68645981. The next prime is 68646049. The reversal of 68646020 is 2064686.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14122564 + 54523456 = 3758^2 + 7384^2 .

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, 13565 + ... + 17924.

It is an arithmetic number, because the mean of its divisors is an integer number (6061825).

Almost surely, 2^68646020 is an apocalyptic number.

It is an amenable number.

68646020 is an abundant number, since it is smaller than the sum of its proper divisors (76837780).

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

68646020 is a wasteful number, since it uses less digits than its factorization.

68646020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31607 (or 31605 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 68646020 is about 8285.2893733412. The cubic root of 68646020 is about 409.4540025451.

The spelling of 68646020 in words is "sixty-eight million, six hundred forty-six thousand, twenty".