64814336 has 72 divisors (see below), whose sum is σ = 140067144. Its totient is φ = 29818880.

The previous prime is 64814327. The next prime is 64814359. The reversal of 64814336 is 63341846.

It can be written as a sum of positive squares in 4 ways, for example, as 29767936 + 35046400 = 5456^2 + 5920^2 .

It is a super-2 number, since 2×64814336² = 8401796302241792, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64814296 and 64814305.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 230516 + ... + 230796.

It is an arithmetic number, because the mean of its divisors is an integer number (1945377).

Almost surely, 2^64814336 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 64814336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70033572).

64814336 is an abundant number, since it is smaller than the sum of its proper divisors (75252808).

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

64814336 is a wasteful number, since it uses less digits than its factorization.

64814336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367 (or 353 counting only the distinct ones).

The product of its digits is 41472, while the sum is 35.

The square root of 64814336 is about 8050.7351217140. The cubic root of 64814336 is about 401.6893882071.

The spelling of 64814336 in words is "sixty-four million, eight hundred fourteen thousand, three hundred thirty-six".