68415220 has 48 divisors (see below), whose sum is σ = 150151680. Its totient is φ = 26158464.

The previous prime is 68415203. The next prime is 68415247. The reversal of 68415220 is 2251486.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42877 + ... + 44443.

It is an arithmetic number, because the mean of its divisors is an integer number (3128160).

Almost surely, 2^68415220 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 68415220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75075840).

68415220 is an abundant number, since it is smaller than the sum of its proper divisors (81736460).

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

68415220 is a wasteful number, since it uses less digits than its factorization.

68415220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672 (or 1670 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 68415220 is about 8271.3493457839. The cubic root of 68415220 is about 408.9946018262.

It can be divided in two parts, 68415 and 220, that added together give a triangular number (68635 = T₃₇₀).

The spelling of 68415220 in words is "sixty-eight million, four hundred fifteen thousand, two hundred twenty".