68646884 has 36 divisors (see below), whose sum is σ = 130246956. Its totient is φ = 31547904.

The previous prime is 68646871. The next prime is 68646887. The reversal of 68646884 is 48864686.

It can be written as a sum of positive squares in 2 ways, for example, as 56550400 + 12096484 = 7520^2 + 3478^2 .

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68646887) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 149984 + ... + 150440.

It is an arithmetic number, because the mean of its divisors is an integer number (3617971).

Almost surely, 2^68646884 is an apocalyptic number.

It is an amenable number.

68646884 is a deficient number, since it is larger than the sum of its proper divisors (61600072).

68646884 is a wasteful number, since it uses less digits than its factorization.

68646884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572 (or 523 counting only the distinct ones).

The product of its digits is 1769472, while the sum is 50.

The square root of 68646884 is about 8285.3415137820. The cubic root of 68646884 is about 409.4557203761.

The spelling of 68646884 in words is "sixty-eight million, six hundred forty-six thousand, eight hundred eighty-four".