68889564 has 36 divisors (see below), whose sum is σ = 179757760. Its totient is φ = 22222080.

The previous prime is 68889517. The next prime is 68889571. The reversal of 68889564 is 46598886.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×68889564² = 9491544056220192, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68889564.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29749 + ... + 31980.

Almost surely, 2^68889564 is an apocalyptic number.

It is an amenable number.

68889564 is an abundant number, since it is smaller than the sum of its proper divisors (110868196).

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

68889564 is a wasteful number, since it uses less digits than its factorization.

68889564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61770 (or 61765 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 54.

The square root of 68889564 is about 8299.9737348982. The cubic root of 68889564 is about 409.9376546090.

The spelling of 68889564 in words is "sixty-eight million, eight hundred eighty-nine thousand, five hundred sixty-four".