53669538 has 48 divisors (see below), whose sum is σ = 125938176. Its totient is φ = 16420320.

The previous prime is 53669537. The next prime is 53669593. The reversal of 53669538 is 83596635.

53669538 is a `hidden beast` number, since 53 + 6 + 69 + 538 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 53669493 and 53669502.

It is not an unprimeable number, because it can be changed into a prime (53669531) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48831 + ... + 49917.

It is an arithmetic number, because the mean of its divisors is an integer number (2623712).

Almost surely, 2^53669538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53669538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62969088).

53669538 is an abundant number, since it is smaller than the sum of its proper divisors (72268638).

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

53669538 is a wasteful number, since it uses less digits than its factorization.

53669538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1319 (or 1316 counting only the distinct ones).

The product of its digits is 583200, while the sum is 45.

The square root of 53669538 is about 7325.9496312765. The cubic root of 53669538 is about 377.2037070992.

The spelling of 53669538 in words is "fifty-three million, six hundred sixty-nine thousand, five hundred thirty-eight".