64787838 has 8 divisors (see below), whose sum is σ = 129575688. Its totient is φ = 21595944.

The previous prime is 64787837. The next prime is 64787839. The reversal of 64787838 is 83878746.

It is an interprime number because it is at equal distance from previous prime (64787837) and next prime (64787839).

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

64787838 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64787837) 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, 5398981 + ... + 5398992.

It is an arithmetic number, because the mean of its divisors is an integer number (16196961).

Almost surely, 2^64787838 is an apocalyptic number.

64787838 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

64787838 is a wasteful number, since it uses less digits than its factorization.

64787838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10797978.

The product of its digits is 1806336, while the sum is 51.

The square root of 64787838 is about 8049.0892652523. The cubic root of 64787838 is about 401.6346399476.

The spelling of 64787838 in words is "sixty-four million, seven hundred eighty-seven thousand, eight hundred thirty-eight".