64346436 has 144 divisors (see below), whose sum is σ = 205470720. Its totient is φ = 16493760.

The previous prime is 64346423. The next prime is 64346437. The reversal of 64346436 is 63464346.

64346436 is a `hidden beast` number, since 6 + 4 + 3 + 4 + 643 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 64346436.

It is not an unprimeable number, because it can be changed into a prime (64346437) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 385225 + ... + 385391.

It is an arithmetic number, because the mean of its divisors is an integer number (1426880).

Almost surely, 2^64346436 is an apocalyptic number.

64346436 is a gapful number since it is divisible by the number (66) 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 64346436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102735360).

64346436 is an abundant number, since it is smaller than the sum of its proper divisors (141124284).

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

64346436 is a wasteful number, since it uses less digits than its factorization.

64346436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334 (or 329 counting only the distinct ones).

The product of its digits is 124416, while the sum is 36.

The square root of 64346436 is about 8021.6230277918. The cubic root of 64346436 is about 400.7204432913.

The spelling of 64346436 in words is "sixty-four million, three hundred forty-six thousand, four hundred thirty-six".