68573640 has 64 divisors (see below), whose sum is σ = 206323200. Its totient is φ = 18232832.

The previous prime is 68573627. The next prime is 68573657. The reversal of 68573640 is 4637586.

It is a super-3 number, since 3×68573640³ (a number of 24 digits) contains 333 as substring.

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 15 ways as a sum of consecutive naturals, for example, 56884 + ... + 58076.

It is an arithmetic number, because the mean of its divisors is an integer number (3223800).

Almost surely, 2^68573640 is an apocalyptic number.

68573640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68573640 is an abundant number, since it is smaller than the sum of its proper divisors (137749560).

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

68573640 is a wasteful number, since it uses less digits than its factorization.

68573640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1686 (or 1682 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 68573640 is about 8280.9202387174. The cubic root of 68573640 is about 409.3100432259.

The spelling of 68573640 in words is "sixty-eight million, five hundred seventy-three thousand, six hundred forty".