68656940 has 48 divisors (see below), whose sum is σ = 162376704. Its totient is φ = 24158400.

The previous prime is 68656927. The next prime is 68656957. The reversal of 68656940 is 4965686.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 68656891 and 68656900.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1787 + ... + 11853.

It is an arithmetic number, because the mean of its divisors is an integer number (3382848).

Almost surely, 2^68656940 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68656940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81188352).

68656940 is an abundant number, since it is smaller than the sum of its proper divisors (93719764).

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

68656940 is a wasteful number, since it uses less digits than its factorization.

68656940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10118 (or 10116 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 68656940 is about 8285.9483464477. The cubic root of 68656940 is about 409.4757129596.

It can be divided in two parts, 68656 and 940, that added together give a palindrome (69596).

The spelling of 68656940 in words is "sixty-eight million, six hundred fifty-six thousand, nine hundred forty".