68343040 has 72 divisors (see below), whose sum is σ = 165564000. Its totient is φ = 27027456.

The previous prime is 68343031. The next prime is 68343049. The reversal of 68343040 is 4034386.

It is an interprime number because it is at equal distance from previous prime (68343031) and next prime (68343049).

It is a super-2 number, since 2×68343040² = 9341542232883200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68343049) 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, 136711 + ... + 137209.

It is an arithmetic number, because the mean of its divisors is an integer number (2299500).

Almost surely, 2^68343040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68343040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82782000).

68343040 is an abundant number, since it is smaller than the sum of its proper divisors (97220960).

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

68343040 is a wasteful number, since it uses less digits than its factorization.

68343040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627 (or 613 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 68343040 is about 8266.9849401097. The cubic root of 68343040 is about 408.8507175737.

The spelling of 68343040 in words is "sixty-eight million, three hundred forty-three thousand, forty".