68344740 has 36 divisors (see below), whose sum is σ = 207312924. Its totient is φ = 18225216.

The previous prime is 68344733. The next prime is 68344751. The reversal of 68344740 is 4744386.

It can be written as a sum of positive squares in 2 ways, for example, as 10188864 + 58155876 = 3192^2 + 7626^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a junction number, because it is equal to n+sod(n) for n = 68344695 and 68344704.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 189667 + ... + 190026.

Almost surely, 2^68344740 is an apocalyptic number.

68344740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68344740 is an abundant number, since it is smaller than the sum of its proper divisors (138968184).

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

68344740 is a wasteful number, since it uses less digits than its factorization.

68344740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379708 (or 379703 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 68344740 is about 8267.0877580923. The cubic root of 68344740 is about 408.8541075334.

The spelling of 68344740 in words is "sixty-eight million, three hundred forty-four thousand, seven hundred forty".