68149396 has 72 divisors (see below), whose sum is σ = 149012136. Its totient is φ = 27095040.

The previous prime is 68149381. The next prime is 68149397. The reversal of 68149396 is 69394186.

It can be written as a sum of positive squares in 4 ways, for example, as 1073296 + 67076100 = 1036^2 + 8190^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68149397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 376426 + ... + 376606.

It is an arithmetic number, because the mean of its divisors is an integer number (2069613).

Almost surely, 2^68149396 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 68149396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74506068).

68149396 is an abundant number, since it is smaller than the sum of its proper divisors (80862740).

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

68149396 is a wasteful number, since it uses less digits than its factorization.

68149396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329 (or 320 counting only the distinct ones).

The product of its digits is 279936, while the sum is 46.

The square root of 68149396 is about 8255.2647443919. The cubic root of 68149396 is about 408.4642047631.

The spelling of 68149396 in words is "sixty-eight million, one hundred forty-nine thousand, three hundred ninety-six".