64704340 has 12 divisors (see below), whose sum is σ = 135879156. Its totient is φ = 25881728.

The previous prime is 64704331. The next prime is 64704349. The reversal of 64704340 is 4340746.

It is an interprime number because it is at equal distance from previous prime (64704331) and next prime (64704349).

It can be written as a sum of positive squares in 2 ways, for example, as 31203396 + 33500944 = 5586^2 + 5788^2 .

It is a super-2 number, since 2×64704340² = 8373303229671200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64704299 and 64704308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64704349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1617589 + ... + 1617628.

It is an arithmetic number, because the mean of its divisors is an integer number (11323263).

Almost surely, 2^64704340 is an apocalyptic number.

It is an amenable number.

64704340 is an abundant number, since it is smaller than the sum of its proper divisors (71174816).

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

64704340 is a wasteful number, since it uses less digits than its factorization.

64704340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3235226 (or 3235224 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 64704340 is about 8043.9007950123. The cubic root of 64704340 is about 401.4620246988.

The spelling of 64704340 in words is "sixty-four million, seven hundred four thousand, three hundred forty".