60640020 has 288 divisors, whose sum is σ = 235872000. Its totient is φ = 12275712.

The previous prime is 60639961. The next prime is 60640051. The reversal of 60640020 is 2004606.

60640020 = T₁₁₉ + T₁₂₀ + ... + T₇₁₄.

60640020 is a `hidden beast` number, since 6 + 0 + 640 + 0 + 20 = 666.

60640020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 = 60639975 and 60640002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 406906 + ... + 407054.

It is an arithmetic number, because the mean of its divisors is an integer number (819000).

Almost surely, 2^60640020 is an apocalyptic number.

60640020 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 60640020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117936000).

60640020 is an abundant number, since it is smaller than the sum of its proper divisors (175231980).

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

60640020 is a wasteful number, since it uses less digits than its factorization.

60640020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 60640020 is about 7787.1702177364. The cubic root of 60640020 is about 392.8738402033.

Adding to 60640020 its reverse (2004606), we get a palindrome (62644626).

The spelling of 60640020 in words is "sixty million, six hundred forty thousand, twenty".