68520456 has 48 divisors (see below), whose sum is σ = 186682860. Its totient is φ = 22704000.

The previous prime is 68520451. The next prime is 68520461. The reversal of 68520456 is 65402586.

It is an interprime number because it is at equal distance from previous prime (68520451) and next prime (68520461).

It can be written as a sum of positive squares in 2 ways, for example, as 48860100 + 19660356 = 6990^2 + 4434^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 68520456.

It is not an unprimeable number, because it can be changed into a prime (68520451) 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, 9706 + ... + 15206.

Almost surely, 2^68520456 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 68520456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93341430).

68520456 is an abundant number, since it is smaller than the sum of its proper divisors (118162404).

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

68520456 is a wasteful number, since it uses less digits than its factorization.

68520456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5686 (or 5679 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 68520456 is about 8277.7083785309. The cubic root of 68520456 is about 409.2041989805.

The spelling of 68520456 in words is "sixty-eight million, five hundred twenty thousand, four hundred fifty-six".