68712644 has 72 divisors (see below), whose sum is σ = 162692544. Its totient is φ = 24523200.

The previous prime is 68712641. The next prime is 68712653. The reversal of 68712644 is 44621786.

It is a junction number, because it is equal to n+sod(n) for n = 68712598 and 68712607.

It is not an unprimeable number, because it can be changed into a prime (68712641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 524459 + ... + 524589.

Almost surely, 2^68712644 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 68712644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81346272).

68712644 is an abundant number, since it is smaller than the sum of its proper divisors (93979900).

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

68712644 is a wasteful number, since it uses less digits than its factorization.

68712644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297 (or 164 counting only the distinct ones).

The product of its digits is 64512, while the sum is 38.

The square root of 68712644 is about 8289.3090182475. The cubic root of 68712644 is about 409.5864241233.

It can be divided in two parts, 68712 and 644, that multiplied together give a triangular number (44250528 = T₉₄₀₇).

The spelling of 68712644 in words is "sixty-eight million, seven hundred twelve thousand, six hundred forty-four".