60021720 has 192 divisors, whose sum is σ = 222393600. Its totient is φ = 13896960.

The previous prime is 60021719. The next prime is 60021737. The reversal of 60021720 is 2712006.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 60021693 and 60021702.

It is a congruent number.

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, 90751 + ... + 91409.

It is an arithmetic number, because the mean of its divisors is an integer number (1158300).

Almost surely, 2^60021720 is an apocalyptic number.

60021720 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 60021720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111196800).

60021720 is an abundant number, since it is smaller than the sum of its proper divisors (162371880).

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

60021720 is a wasteful number, since it uses less digits than its factorization.

60021720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710 (or 703 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 60021720 is about 7747.3685855263. The cubic root of 60021720 is about 391.5339978207.

Adding to 60021720 its reverse (2712006), we get a palindrome (62733726).

The spelling of 60021720 in words is "sixty million, twenty-one thousand, seven hundred twenty".