67212720 has 240 divisors, whose sum is σ = 246249120. Its totient is φ = 16837632.

The previous prime is 67212707. The next prime is 67212751. The reversal of 67212720 is 2721276.

It is a tau number, because it is divible by the number of its divisors (240).

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1816542 + ... + 1816578.

It is an arithmetic number, because the mean of its divisors is an integer number (1026038).

Almost surely, 2^67212720 is an apocalyptic number.

67212720 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 67212720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123124560).

67212720 is an abundant number, since it is smaller than the sum of its proper divisors (179036400).

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

67212720 is a wasteful number, since it uses less digits than its factorization.

67212720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117 (or 76 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 67212720 is about 8198.3364166153. The cubic root of 67212720 is about 406.5841930157.

Adding to 67212720 its reverse (2721276), we get a palindrome (69933996).

The spelling of 67212720 in words is "sixty-seven million, two hundred twelve thousand, seven hundred twenty".