64887823 has 48 divisors (see below), whose sum is σ = 90091008. Its totient is φ = 45460800.

The previous prime is 64887811. The next prime is 64887881. The reversal of 64887823 is 32878846.

It is not a de Polignac number, because 64887823 - 2⁹ = 64887311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64887883) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 781740 + ... + 781822.

It is an arithmetic number, because the mean of its divisors is an integer number (1876896).

Almost surely, 2^64887823 is an apocalyptic number.

64887823 is a deficient number, since it is larger than the sum of its proper divisors (25203185).

64887823 is a wasteful number, since it uses less digits than its factorization.

64887823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 185 counting only the distinct ones).

The product of its digits is 516096, while the sum is 46.

The square root of 64887823 is about 8055.2978219306. The cubic root of 64887823 is about 401.8411437221.

The spelling of 64887823 in words is "sixty-four million, eight hundred eighty-seven thousand, eight hundred twenty-three".