68680404 has 72 divisors (see below), whose sum is σ = 188944392. Its totient is φ = 20908800.

The previous prime is 68680397. The next prime is 68680433. The reversal of 68680404 is 40408686.

It can be written as a sum of positive squares in 4 ways, for example, as 35640900 + 33039504 = 5970^2 + 5748^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 46542 + ... + 47994.

Almost surely, 2^68680404 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 68680404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94472196).

68680404 is an abundant number, since it is smaller than the sum of its proper divisors (120263988).

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

68680404 is a wasteful number, since it uses less digits than its factorization.

68680404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1577 (or 1572 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 68680404 is about 8287.3641165331. The cubic root of 68680404 is about 409.5223547306.

The spelling of 68680404 in words is "sixty-eight million, six hundred eighty thousand, four hundred four".