52878405 has 16 divisors (see below), whose sum is σ = 87335424. Its totient is φ = 27291840.

The previous prime is 52878401. The next prime is 52878443. The reversal of 52878405 is 50487825.

52878405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 52878405 - 2² = 52878401 is a prime.

It is a super-2 number, since 2×52878405² = 5592251430688050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52878401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56394 + ... + 57323.

It is an arithmetic number, because the mean of its divisors is an integer number (5458464).

Almost surely, 2^52878405 is an apocalyptic number.

It is an amenable number.

52878405 is a deficient number, since it is larger than the sum of its proper divisors (34457019).

52878405 is a wasteful number, since it uses less digits than its factorization.

52878405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113756.

The product of its (nonzero) digits is 89600, while the sum is 39.

The square root of 52878405 is about 7271.7539149781. The cubic root of 52878405 is about 375.3410940966.

The spelling of 52878405 in words is "fifty-two million, eight hundred seventy-eight thousand, four hundred five".