68898144 has 192 divisors, whose sum is σ = 226146816. Its totient is φ = 17915904.

The previous prime is 68898143. The next prime is 68898149. The reversal of 68898144 is 44189886.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 68898093 and 68898102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68898143) 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 31 ways as a sum of consecutive naturals, for example, 422607 + ... + 422769.

It is an arithmetic number, because the mean of its divisors is an integer number (1177848).

Almost surely, 2^68898144 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 68898144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113073408).

68898144 is an abundant number, since it is smaller than the sum of its proper divisors (157248672).

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

68898144 is a wasteful number, since it uses less digits than its factorization.

68898144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237 (or 229 counting only the distinct ones).

The product of its digits is 442368, while the sum is 48.

The square root of 68898144 is about 8300.4905879111. The cubic root of 68898144 is about 409.9546727602.

The spelling of 68898144 in words is "sixty-eight million, eight hundred ninety-eight thousand, one hundred forty-four".