64436346 has 48 divisors (see below), whose sum is σ = 150925320. Its totient is φ = 19751040.

The previous prime is 64436327. The next prime is 64436377. The reversal of 64436346 is 64363446.

64436346 is a `hidden beast` number, since 644 + 3 + 6 + 3 + 4 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 51194025 + 13242321 = 7155^2 + 3639^2 .

It is a super-3 number, since 3×64436346³ (a number of 24 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 64436346.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 118836 + ... + 119376.

Almost surely, 2^64436346 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64436346, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75462660).

64436346 is an abundant number, since it is smaller than the sum of its proper divisors (86488974).

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

64436346 is a wasteful number, since it uses less digits than its factorization.

64436346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071 (or 1068 counting only the distinct ones).

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

The square root of 64436346 is about 8027.2252989436. The cubic root of 64436346 is about 400.9069960078.

Subtracting from 64436346 its reverse (64363446), we obtain a square (72900 = 270²).

The spelling of 64436346 in words is "sixty-four million, four hundred thirty-six thousand, three hundred forty-six".