68452240 has 40 divisors (see below), whose sum is σ = 159777720. Its totient is φ = 27273216.

The previous prime is 68452201. The next prime is 68452243. The reversal of 68452240 is 4225486.

It can be written as a sum of positive squares in 4 ways, for example, as 9960336 + 58491904 = 3156^2 + 7648^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×68452240² = 9371418322035200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68452243) 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, 20616 + ... + 23704.

It is an arithmetic number, because the mean of its divisors is an integer number (3994443).

Almost surely, 2^68452240 is an apocalyptic number.

It is an amenable number.

68452240 is an abundant number, since it is smaller than the sum of its proper divisors (91325480).

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

68452240 is a wasteful number, since it uses less digits than its factorization.

68452240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3379 (or 3373 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 68452240 is about 8273.5868884058. The cubic root of 68452240 is about 409.0683585624.

The spelling of 68452240 in words is "sixty-eight million, four hundred fifty-two thousand, two hundred forty".