68891080 has 32 divisors (see below), whose sum is σ = 155244600. Its totient is φ = 27513856.

The previous prime is 68891071. The next prime is 68891099. The reversal of 68891080 is 8019886.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18679684 + 50211396 = 4322^2 + 7086^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

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 7 ways as a sum of consecutive naturals, for example, 43584 + ... + 45136.

Almost surely, 2^68891080 is an apocalyptic number.

It is an amenable number.

68891080 is an abundant number, since it is smaller than the sum of its proper divisors (86353520).

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

68891080 is a wasteful number, since it uses less digits than its factorization.

68891080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2673 (or 2669 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 40.

The square root of 68891080 is about 8300.0650599860. The cubic root of 68891080 is about 409.9406616485.

The spelling of 68891080 in words is "sixty-eight million, eight hundred ninety-one thousand, eighty".