68369840 has 120 divisors (see below), whose sum is σ = 199883040. Its totient is φ = 21288960.

The previous prime is 68369813. The next prime is 68369857. The reversal of 68369840 is 4896386.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 68369791 and 68369800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67256 + ... + 68264.

It is an arithmetic number, because the mean of its divisors is an integer number (1665692).

Almost surely, 2^68369840 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 68369840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99941520).

68369840 is an abundant number, since it is smaller than the sum of its proper divisors (131513200).

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

68369840 is a wasteful number, since it uses less digits than its factorization.

68369840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051 (or 1034 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 68369840 is about 8268.6056865713. The cubic root of 68369840 is about 408.9041527506.

The spelling of 68369840 in words is "sixty-eight million, three hundred sixty-nine thousand, eight hundred forty".