68440845 has 16 divisors (see below), whose sum is σ = 119460672. Its totient is φ = 33183360.

The previous prime is 68440843. The next prime is 68440859. The reversal of 68440845 is 54804486.

68440845 = T₁₅₅₀ + T₁₅₅₁ + ... + T₁₆₀₄.

It is not a de Polignac number, because 68440845 - 2¹ = 68440843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68440843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207232 + ... + 207561.

It is an arithmetic number, because the mean of its divisors is an integer number (7466292).

Almost surely, 2^68440845 is an apocalyptic number.

It is an amenable number.

68440845 is a deficient number, since it is larger than the sum of its proper divisors (51019827).

68440845 is a wasteful number, since it uses less digits than its factorization.

68440845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414812.

The product of its (nonzero) digits is 122880, while the sum is 39.

The square root of 68440845 is about 8272.8982225094. The cubic root of 68440845 is about 409.0456585864.

The spelling of 68440845 in words is "sixty-eight million, four hundred forty thousand, eight hundred forty-five".