68491008 has 126 divisors (see below), whose sum is σ = 205536464. Its totient is φ = 22768128.

The previous prime is 68490971. The next prime is 68491013. The reversal of 68491008 is 80019486.

It is a happy number.

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 13 ways as a sum of consecutive naturals, for example, 186441 + ... + 186807.

Almost surely, 2^68491008 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 68491008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102768232).

68491008 is an abundant number, since it is smaller than the sum of its proper divisors (137045456).

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

68491008 is an frugal number, since it uses more digits than its factorization.

68491008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401 (or 372 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 68491008 is about 8275.9294342086. The cubic root of 68491008 is about 409.1455694236.

The spelling of 68491008 in words is "sixty-eight million, four hundred ninety-one thousand, eight".