53643878 has 24 divisors (see below), whose sum is σ = 85587840. Its totient is φ = 25212240.

The previous prime is 53643869. The next prime is 53643883. The reversal of 53643878 is 87834635.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137708 + ... + 138096.

It is an arithmetic number, because the mean of its divisors is an integer number (3566160).

Almost surely, 2^53643878 is an apocalyptic number.

53643878 is a deficient number, since it is larger than the sum of its proper divisors (31943962).

53643878 is a wasteful number, since it uses less digits than its factorization.

53643878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620 (or 601 counting only the distinct ones).

The product of its digits is 483840, while the sum is 44.

The square root of 53643878 is about 7324.1981131043. The cubic root of 53643878 is about 377.1435824273.

Multiplying 53643878 by its sum of digits (44), we get a palindrome (2360330632).

The spelling of 53643878 in words is "fifty-three million, six hundred forty-three thousand, eight hundred seventy-eight".