53450820 has 144 divisors (see below), whose sum is σ = 173496960. Its totient is φ = 13659840.

The previous prime is 53450779. The next prime is 53450821. The reversal of 53450820 is 2805435.

53450820 is a `hidden beast` number, since 534 + 50 + 82 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (53450821) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 518889 + ... + 518991.

It is an arithmetic number, because the mean of its divisors is an integer number (1204840).

Almost surely, 2^53450820 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 53450820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86748480).

53450820 is an abundant number, since it is smaller than the sum of its proper divisors (120046140).

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

53450820 is a wasteful number, since it uses less digits than its factorization.

53450820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183 (or 144 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 53450820 is about 7311.0067706165. The cubic root of 53450820 is about 376.6906068093.

The spelling of 53450820 in words is "fifty-three million, four hundred fifty thousand, eight hundred twenty".