64347538 has 8 divisors (see below), whose sum is σ = 96627132. Its totient is φ = 32138496.

The previous prime is 64347473. The next prime is 64347539. The reversal of 64347538 is 83574346.

It can be written as a sum of positive squares in 2 ways, for example, as 58476609 + 5870929 = 7647^2 + 2423^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×64347538³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 64347538.

It is not an unprimeable number, because it can be changed into a prime (64347539) 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, 15295 + ... + 19042.

Almost surely, 2^64347538 is an apocalyptic number.

64347538 is a deficient number, since it is larger than the sum of its proper divisors (32279594).

64347538 is a wasteful number, since it uses less digits than its factorization.

64347538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35276.

The product of its digits is 241920, while the sum is 40.

The square root of 64347538 is about 8021.6917168388. The cubic root of 64347538 is about 400.7227308638.

The spelling of 64347538 in words is "sixty-four million, three hundred forty-seven thousand, five hundred thirty-eight".