52391808 has 192 divisors, whose sum is σ = 176623200. Its totient is φ = 14598144.

The previous prime is 52391783. The next prime is 52391821. The reversal of 52391808 is 80819325.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 588628 + ... + 588716.

Almost surely, 2^52391808 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 52391808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88311600).

52391808 is an abundant number, since it is smaller than the sum of its proper divisors (124231392).

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

52391808 is a wasteful number, since it uses less digits than its factorization.

52391808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 52391808 is about 7238.2185653654. The cubic root of 52391808 is about 374.1862246633.

The spelling of 52391808 in words is "fifty-two million, three hundred ninety-one thousand, eight hundred eight".