68897790 has 112 divisors (see below), whose sum is σ = 200517408. Its totient is φ = 16936128.

The previous prime is 68897789. The next prime is 68897797. The reversal of 68897790 is 9779886.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68897797) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 94407 + ... + 95133.

It is an arithmetic number, because the mean of its divisors is an integer number (1790334).

Almost surely, 2^68897790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68897790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100258704).

68897790 is an abundant number, since it is smaller than the sum of its proper divisors (131619618).

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

68897790 is a wasteful number, since it uses less digits than its factorization.

68897790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765 (or 750 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 54.

The square root of 68897790 is about 8300.4692638429. The cubic root of 68897790 is about 409.9539706407.

The spelling of 68897790 in words is "sixty-eight million, eight hundred ninety-seven thousand, seven hundred ninety".