64340740 has 48 divisors (see below), whose sum is σ = 138442752. Its totient is φ = 25111296.

The previous prime is 64340723. The next prime is 64340747. The reversal of 64340740 is 4704346.

It is a junction number, because it is equal to n+sod(n) for n = 64340699 and 64340708.

It is not an unprimeable number, because it can be changed into a prime (64340747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185247 + ... + 185593.

It is an arithmetic number, because the mean of its divisors is an integer number (2884224).

Almost surely, 2^64340740 is an apocalyptic number.

It is an amenable number.

64340740 is an abundant number, since it is smaller than the sum of its proper divisors (74102012).

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

64340740 is a wasteful number, since it uses less digits than its factorization.

64340740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556 (or 554 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 64340740 is about 8021.2679795653. The cubic root of 64340740 is about 400.7086189068.

The spelling of 64340740 in words is "sixty-four million, three hundred forty thousand, seven hundred forty".