68890464 has 72 divisors (see below), whose sum is σ = 196894152. Its totient is φ = 22848000.

The previous prime is 68890441. The next prime is 68890517. The reversal of 68890464 is 46409886.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

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, 71812 + ... + 72764.

It is an arithmetic number, because the mean of its divisors is an integer number (2734641).

Almost surely, 2^68890464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68890464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98447076).

68890464 is an abundant number, since it is smaller than the sum of its proper divisors (128003688).

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

68890464 is a wasteful number, since it uses less digits than its factorization.

68890464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220 (or 1209 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 68890464 is about 8300.0279517602. The cubic root of 68890464 is about 409.9394397961.

The spelling of 68890464 in words is "sixty-eight million, eight hundred ninety thousand, four hundred sixty-four".