64878423 has 16 divisors (see below), whose sum is σ = 93381120. Its totient is φ = 39943904.

The previous prime is 64878421. The next prime is 64878433. The reversal of 64878423 is 32487846.

It is not a de Polignac number, because 64878423 - 2¹ = 64878421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64878421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14211 + ... + 18212.

It is an arithmetic number, because the mean of its divisors is an integer number (5836320).

Almost surely, 2^64878423 is an apocalyptic number.

64878423 is a deficient number, since it is larger than the sum of its proper divisors (28502697).

64878423 is a wasteful number, since it uses less digits than its factorization.

64878423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32478.

The product of its digits is 258048, while the sum is 42.

The square root of 64878423 is about 8054.7143338544. The cubic root of 64878423 is about 401.8217384933.

The spelling of 64878423 in words is "sixty-four million, eight hundred seventy-eight thousand, four hundred twenty-three".