53897820 has 96 divisors (see below), whose sum is σ = 162969408. Its totient is φ = 13258752.

The previous prime is 53897819. The next prime is 53897827. The reversal of 53897820 is 2879835.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53897827) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53562 + ... + 54558.

It is an arithmetic number, because the mean of its divisors is an integer number (1697598).

Almost surely, 2^53897820 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 53897820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81484704).

53897820 is an abundant number, since it is smaller than the sum of its proper divisors (109071588).

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

53897820 is a wasteful number, since it uses less digits than its factorization.

53897820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079 (or 1077 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 53897820 is about 7341.5134679438. The cubic root of 53897820 is about 377.7377593775.

The spelling of 53897820 in words is "fifty-three million, eight hundred ninety-seven thousand, eight hundred twenty".