53865140 has 24 divisors (see below), whose sum is σ = 129276672. Its totient is φ = 18468000.

The previous prime is 53865131. The next prime is 53865169. The reversal of 53865140 is 4156835.

It is a happy number.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 53865097 and 53865106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192236 + ... + 192515.

It is an arithmetic number, because the mean of its divisors is an integer number (5386528).

Almost surely, 2^53865140 is an apocalyptic number.

It is an amenable number.

53865140 is an abundant number, since it is smaller than the sum of its proper divisors (75411532).

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

53865140 is a wasteful number, since it uses less digits than its factorization.

53865140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384767 (or 384765 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 53865140 is about 7339.2874313519. The cubic root of 53865140 is about 377.6613990487.

The spelling of 53865140 in words is "fifty-three million, eight hundred sixty-five thousand, one hundred forty".