64964340 has 144 divisors (see below), whose sum is σ = 230211072. Its totient is φ = 14519808.

The previous prime is 64964309. The next prime is 64964353. The reversal of 64964340 is 4346946.

64964340 is a `hidden beast` number, since 6 + 4 + 9 + 643 + 4 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 64964295 and 64964304.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 58672 + ... + 59768.

It is an arithmetic number, because the mean of its divisors is an integer number (1598688).

Almost surely, 2^64964340 is an apocalyptic number.

64964340 is a gapful number since it is divisible by the number (60) 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 64964340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115105536).

64964340 is an abundant number, since it is smaller than the sum of its proper divisors (165246732).

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

64964340 is a wasteful number, since it uses less digits than its factorization.

64964340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166 (or 1161 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 64964340 is about 8060.0459055765. The cubic root of 64964340 is about 401.9990346750. Note that the first 3 decimals are identical.

The spelling of 64964340 in words is "sixty-four million, nine hundred sixty-four thousand, three hundred forty".