68379904 has 36 divisors (see below), whose sum is σ = 137602080. Its totient is φ = 33912320.

The previous prime is 68379901. The next prime is 68379907. The reversal of 68379904 is 40997386.

It is an interprime number because it is at equal distance from previous prime (68379901) and next prime (68379907).

It is a super-2 number, since 2×68379904² = 9351622542098432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68379901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32517 + ... + 34555.

It is an arithmetic number, because the mean of its divisors is an integer number (3822280).

Almost surely, 2^68379904 is an apocalyptic number.

68379904 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68379904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68801040).

68379904 is an abundant number, since it is smaller than the sum of its proper divisors (69222176).

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

68379904 is a wasteful number, since it uses less digits than its factorization.

68379904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2186 (or 2172 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 68379904 is about 8269.2142311105. The cubic root of 68379904 is about 408.9242152493.

The spelling of 68379904 in words is "sixty-eight million, three hundred seventy-nine thousand, nine hundred four".