60731640 has 128 divisors (see below), whose sum is σ = 206452800. Its totient is φ = 15874560.

The previous prime is 60731621. The next prime is 60731641. The reversal of 60731640 is 4613706.

60731640 is a `hidden beast` number, since 607 + 3 + 16 + 40 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60731641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56710 + ... + 57770.

Almost surely, 2^60731640 is an apocalyptic number.

60731640 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 60731640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103226400).

60731640 is an abundant number, since it is smaller than the sum of its proper divisors (145721160).

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

60731640 is a wasteful number, since it uses less digits than its factorization.

60731640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134 (or 1124 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 60731640 is about 7793.0507505084. The cubic root of 60731640 is about 393.0716028267.

The spelling of 60731640 in words is "sixty million, seven hundred thirty-one thousand, six hundred forty".