64306040 has 64 divisors (see below), whose sum is σ = 149960160. Its totient is φ = 24801280.

The previous prime is 64306009. The next prime is 64306043. The reversal of 64306040 is 4060346.

It is a junction number, because it is equal to n+sod(n) for n = 64305997 and 64306015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64306043) 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, 185147 + ... + 185493.

Almost surely, 2^64306040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64306040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74980080).

64306040 is an abundant number, since it is smaller than the sum of its proper divisors (85654120).

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

64306040 is a wasteful number, since it uses less digits than its factorization.

64306040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512 (or 508 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 64306040 is about 8019.1046881806. The cubic root of 64306040 is about 400.6365697433.

Adding to 64306040 its reverse (4060346), we get a palindrome (68366386).

The spelling of 64306040 in words is "sixty-four million, three hundred six thousand, forty".