64313730 has 128 divisors (see below), whose sum is σ = 187971840. Its totient is φ = 15552000.

The previous prime is 64313729. The next prime is 64313749. The reversal of 64313730 is 3731346.

It is a happy number.

64313730 is a `hidden beast` number, since 643 + 13 + 7 + 3 + 0 = 666.

64313730 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 (27).

It is a junction number, because it is equal to n+sod(n) for n = 64313694 and 64313703.

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 63 ways as a sum of consecutive naturals, for example, 256105 + ... + 256355.

It is an arithmetic number, because the mean of its divisors is an integer number (1468530).

Almost surely, 2^64313730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64313730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93985920).

64313730 is an abundant number, since it is smaller than the sum of its proper divisors (123658110).

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

64313730 is a wasteful number, since it uses less digits than its factorization.

64313730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353 (or 347 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 27.

The square root of 64313730 is about 8019.5841538075. The cubic root of 64313730 is about 400.6525390697.

The spelling of 64313730 in words is "sixty-four million, three hundred thirteen thousand, seven hundred thirty".