68644810 has 64 divisors (see below), whose sum is σ = 142884000. Its totient is φ = 23519232.

The previous prime is 68644799. The next prime is 68644831. The reversal of 68644810 is 1844686.

It can be written as a sum of positive squares in 16 ways, for example, as 3568321 + 65076489 = 1889^2 + 8067^2 .

It is a super-2 number, since 2×68644810² = 9424219879872200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68644810.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 196516 + ... + 196864.

Almost surely, 2^68644810 is an apocalyptic number.

68644810 is an abundant number, since it is smaller than the sum of its proper divisors (74239190).

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

68644810 is a wasteful number, since it uses less digits than its factorization.

68644810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475.

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 68644810 is about 8285.2163520333. The cubic root of 68644810 is about 409.4515967623.

The spelling of 68644810 in words is "sixty-eight million, six hundred forty-four thousand, eight hundred ten".