68445810 has 112 divisors (see below), whose sum is σ = 190050840. Its totient is φ = 17729280.

The previous prime is 68445803. The next prime is 68445827. The reversal of 68445810 is 1854486.

It can be written as a sum of positive squares in 4 ways, for example, as 53538489 + 14907321 = 7317^2 + 3861^2 .

It is a super-2 number, since 2×68445810² = 9369657813112200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 298776 + ... + 299004.

Almost surely, 2^68445810 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68445810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95025420).

68445810 is an abundant number, since it is smaller than the sum of its proper divisors (121605030).

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

68445810 is a wasteful number, since it uses less digits than its factorization.

68445810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295 (or 280 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 68445810 is about 8273.1982932842. The cubic root of 68445810 is about 409.0555496711.

The spelling of 68445810 in words is "sixty-eight million, four hundred forty-five thousand, eight hundred ten".