68903136 has 72 divisors (see below), whose sum is σ = 203223384. Its totient is φ = 22965120.

The previous prime is 68903069. The next prime is 68903137. The reversal of 68903136 is 63130986.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

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

It is a self number, because there is not a number n which added to its sum of digits gives 68903136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68903137) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3346 + ... + 12206.

It is an arithmetic number, because the mean of its divisors is an integer number (2822547).

Almost surely, 2^68903136 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 68903136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101611692).

68903136 is an abundant number, since it is smaller than the sum of its proper divisors (134320248).

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

68903136 is an equidigital number, since it uses as much as digits as its factorization.

68903136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8886 (or 8866 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 68903136 is about 8300.7912875822. The cubic root of 68903136 is about 409.9645735799.

The spelling of 68903136 in words is "sixty-eight million, nine hundred three thousand, one hundred thirty-six".