53897856 has 64 divisors (see below), whose sum is σ = 144742080. Its totient is φ = 17768448.

The previous prime is 53897849. The next prime is 53897869. The reversal of 53897856 is 65879835.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 53897799 and 53897808.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36525 + ... + 37971.

It is an arithmetic number, because the mean of its divisors is an integer number (2261595).

Almost surely, 2^53897856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53897856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72371040).

53897856 is an abundant number, since it is smaller than the sum of its proper divisors (90844224).

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

53897856 is a wasteful number, since it uses less digits than its factorization.

53897856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561 (or 1549 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 51.

The square root of 53897856 is about 7341.5159197539. The cubic root of 53897856 is about 377.7378434784.

The spelling of 53897856 in words is "fifty-three million, eight hundred ninety-seven thousand, eight hundred fifty-six".