53405538 has 8 divisors (see below), whose sum is σ = 106811088. Its totient is φ = 17801844.

The previous prime is 53405537. The next prime is 53405549. The reversal of 53405538 is 83550435.

It is a sphenic number, since it is the product of 3 distinct primes.

53405538 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 53405499 and 53405508.

It is not an unprimeable number, because it can be changed into a prime (53405533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4450456 + ... + 4450467.

It is an arithmetic number, because the mean of its divisors is an integer number (13351386).

Almost surely, 2^53405538 is an apocalyptic number.

53405538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

53405538 is a wasteful number, since it uses less digits than its factorization.

53405538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8900928.

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 53405538 is about 7307.9092769410. The cubic root of 53405538 is about 376.5842029341.

It can be divided in two parts, 5340 and 5538, that added together give a triangular number (10878 = T₁₄₇).

The spelling of 53405538 in words is "fifty-three million, four hundred five thousand, five hundred thirty-eight".