68575140 has 144 divisors (see below), whose sum is σ = 222418560. Its totient is φ = 17539200.

The previous prime is 68575099. The next prime is 68575141. The reversal of 68575140 is 4157586.

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 = 68575095 and 68575104.

It is not an unprimeable number, because it can be changed into a prime (68575141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 454065 + ... + 454215.

Almost surely, 2^68575140 is an apocalyptic number.

68575140 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 68575140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111209280).

68575140 is an abundant number, since it is smaller than the sum of its proper divisors (153843420).

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

68575140 is a wasteful number, since it uses less digits than its factorization.

68575140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 68575140 is about 8281.0108078664. The cubic root of 68575140 is about 409.3130276603.

The spelling of 68575140 in words is "sixty-eight million, five hundred seventy-five thousand, one hundred forty".