53208820 has 96 divisors (see below), whose sum is σ = 133249536. Its totient is φ = 17472000.

The previous prime is 53208817. The next prime is 53208833. The reversal of 53208820 is 2880235.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 526770 + ... + 526870.

It is an arithmetic number, because the mean of its divisors is an integer number (1388016).

Almost surely, 2^53208820 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 53208820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66624768).

53208820 is an abundant number, since it is smaller than the sum of its proper divisors (80040716).

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

53208820 is a wasteful number, since it uses less digits than its factorization.

53208820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 53208820 is about 7294.4376068344. The cubic root of 53208820 is about 376.1212544648.

The spelling of 53208820 in words is "fifty-three million, two hundred eight thousand, eight hundred twenty".