53699328 has 144 divisors (see below), whose sum is σ = 168507360. Its totient is φ = 16809984.

The previous prime is 53699323. The next prime is 53699353. The reversal of 53699328 is 82399635.

53699328 is a `hidden beast` number, since 536 + 9 + 93 + 28 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is not an unprimeable number, because it can be changed into a prime (53699323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117276 + ... + 117732.

It is an arithmetic number, because the mean of its divisors is an integer number (1170190).

Almost surely, 2^53699328 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 53699328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84253680).

53699328 is an abundant number, since it is smaller than the sum of its proper divisors (114808032).

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

53699328 is a wasteful number, since it uses less digits than its factorization.

53699328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499 (or 479 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 53699328 is about 7327.9825327303. The cubic root of 53699328 is about 377.2734848566.

The spelling of 53699328 in words is "fifty-three million, six hundred ninety-nine thousand, three hundred twenty-eight".