68511420 has 168 divisors, whose sum is σ = 223286784. Its totient is φ = 17635968.

The previous prime is 68511419. The next prime is 68511461. The reversal of 68511420 is 2411586.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 539397 + ... + 539523.

It is an arithmetic number, because the mean of its divisors is an integer number (1329088).

Almost surely, 2^68511420 is an apocalyptic number.

68511420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68511420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111643392).

68511420 is an abundant number, since it is smaller than the sum of its proper divisors (154775364).

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

68511420 is a wasteful number, since it uses less digits than its factorization.

68511420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 68511420 is about 8277.1625573019. The cubic root of 68511420 is about 409.1862105242.

The spelling of 68511420 in words is "sixty-eight million, five hundred eleven thousand, four hundred twenty".