60721440 has 192 divisors, whose sum is σ = 212357376. Its totient is φ = 14487552.

The previous prime is 60721429. The next prime is 60721457. The reversal of 60721440 is 4412706.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 60721440.

It is a congruent number.

It is an unprimeable number.

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, 230749 + ... + 231011.

It is an arithmetic number, because the mean of its divisors is an integer number (1106028).

Almost surely, 2^60721440 is an apocalyptic number.

60721440 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 60721440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106178688).

60721440 is an abundant number, since it is smaller than the sum of its proper divisors (151635936).

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

60721440 is a wasteful number, since it uses less digits than its factorization.

60721440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331 (or 323 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 60721440 is about 7792.3962938239. The cubic root of 60721440 is about 393.0495958749.

The spelling of 60721440 in words is "sixty million, seven hundred twenty-one thousand, four hundred forty".