68042280 has 128 divisors (see below), whose sum is σ = 216172800. Its totient is φ = 17098752.

The previous prime is 68042243. The next prime is 68042309. The reversal of 68042280 is 8224086.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 245502 + ... + 245778.

It is an arithmetic number, because the mean of its divisors is an integer number (1688850).

Almost surely, 2^68042280 is an apocalyptic number.

68042280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68042280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108086400).

68042280 is an abundant number, since it is smaller than the sum of its proper divisors (148130520).

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

68042280 is a wasteful number, since it uses less digits than its factorization.

68042280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403 (or 399 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 68042280 is about 8248.7744544265. The cubic root of 68042280 is about 408.2500869680.

The spelling of 68042280 in words is "sixty-eight million, forty-two thousand, two hundred eighty".