68260644 has 99 divisors (see below), whose sum is σ = 190343377. Its totient is φ = 21415104.

The previous prime is 68260639. The next prime is 68260649. The reversal of 68260644 is 44606286.

It is a happy number.

The square root of 68260644 is 8262.

It is a perfect power (a square), and thus also a powerful number.

68260644 is a `hidden beast` number, since 6 + 8 + 2 + 6 + 0 + 644 = 666.

It is an interprime number because it is at equal distance from previous prime (68260639) and next prime (68260649).

It can be written as a sum of positive squares in only one way, i.e., 53144100 + 15116544 = 7290^2 + 3888^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68260599 and 68260608.

It is not an unprimeable number, because it can be changed into a prime (68260649) by changing a digit.

It is a polite number, since it can be written in 32 ways as a sum of consecutive naturals, for example, 4015324 + ... + 4015340.

Almost surely, 2^68260644 is an apocalyptic number.

68260644 is the 8262-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68260644

68260644 is an abundant number, since it is smaller than the sum of its proper divisors (122082733).

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

68260644 is an equidigital number, since it uses as much as digits as its factorization.

68260644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68 (or 22 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The cubic root of 68260644 is about 408.6863447713.

Multiplying 68260644 by its sum of digits (36), we get a square (2457383184 = 49572²).

68260644 divided by its sum of digits (36) gives a square (1896129 = 1377²).

The spelling of 68260644 in words is "sixty-eight million, two hundred sixty thousand, six hundred forty-four".