68340442 has 16 divisors (see below), whose sum is σ = 108737640. Its totient is φ = 32101888.

The previous prime is 68340439. The next prime is 68340449. The reversal of 68340442 is 24404386.

It can be written as a sum of positive squares in 4 ways, for example, as 64336441 + 4004001 = 8021^2 + 2001^2 .

It is not an unprimeable number, because it can be changed into a prime (68340449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21534 + ... + 24502.

Almost surely, 2^68340442 is an apocalyptic number.

68340442 is a deficient number, since it is larger than the sum of its proper divisors (40397198).

68340442 is a wasteful number, since it uses less digits than its factorization.

68340442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3665.

The product of its (nonzero) digits is 18432, while the sum is 31.

The square root of 68340442 is about 8266.8278075692. The cubic root of 68340442 is about 408.8455368090.

The spelling of 68340442 in words is "sixty-eight million, three hundred forty thousand, four hundred forty-two".