64877142 has 32 divisors (see below), whose sum is σ = 142819200. Its totient is φ = 19483520.

The previous prime is 64877119. The next prime is 64877149. The reversal of 64877142 is 24177846.

It is a self number, because there is not a number n which added to its sum of digits gives 64877142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64877149) 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 15 ways as a sum of consecutive naturals, for example, 3109 + ... + 11807.

It is an arithmetic number, because the mean of its divisors is an integer number (4463100).

Almost surely, 2^64877142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64877142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71409600).

64877142 is an abundant number, since it is smaller than the sum of its proper divisors (77942058).

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

64877142 is a wasteful number, since it uses less digits than its factorization.

64877142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8828.

The product of its digits is 75264, while the sum is 39.

The square root of 64877142 is about 8054.6348148131. The cubic root of 64877142 is about 401.8190938696.

The spelling of 64877142 in words is "sixty-four million, eight hundred seventy-seven thousand, one hundred forty-two".