64874378 has 8 divisors (see below), whose sum is σ = 97440420. Its totient is φ = 32394240.

The previous prime is 64874371. The next prime is 64874387. The reversal of 64874378 is 87347846.

It can be written as a sum of positive squares in 2 ways, for example, as 57350329 + 7524049 = 7573^2 + 2743^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64874371) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 19553 + ... + 22628.

Almost surely, 2^64874378 is an apocalyptic number.

64874378 is a deficient number, since it is larger than the sum of its proper divisors (32566042).

64874378 is a wasteful number, since it uses less digits than its factorization.

64874378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42952.

The product of its digits is 903168, while the sum is 47.

The square root of 64874378 is about 8054.4632347538. The cubic root of 64874378 is about 401.8133874749.

The spelling of 64874378 in words is "sixty-four million, eight hundred seventy-four thousand, three hundred seventy-eight".