60721578 has 24 divisors (see below), whose sum is σ = 131788800. Its totient is φ = 20205864.

The previous prime is 60721559. The next prime is 60721579. The reversal of 60721578 is 87512706.

60721578 is a `hidden beast` number, since 60 + 7 + 21 + 578 = 666.

It is a super-2 number, since 2×60721578² = 7374220069620168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (60721579) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9303 + ... + 14421.

It is an arithmetic number, because the mean of its divisors is an integer number (5491200).

Almost surely, 2^60721578 is an apocalyptic number.

60721578 is an abundant number, since it is smaller than the sum of its proper divisors (71067222).

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

60721578 is a wasteful number, since it uses less digits than its factorization.

60721578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5786 (or 5783 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 60721578 is about 7792.4051486046. The cubic root of 60721578 is about 393.0498936324.

The spelling of 60721578 in words is "sixty million, seven hundred twenty-one thousand, five hundred seventy-eight".