52919640 has 96 divisors (see below), whose sum is σ = 182126880. Its totient is φ = 13280256.

The previous prime is 52919639. The next prime is 52919653. The reversal of 52919640 is 4691925.

52919640 is a `hidden beast` number, since 5 + 2 + 9 + 1 + 9 + 640 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 52919595 and 52919604.

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, 1797 + ... + 10443.

It is an arithmetic number, because the mean of its divisors is an integer number (1897155).

Almost surely, 2^52919640 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 52919640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91063440).

52919640 is an abundant number, since it is smaller than the sum of its proper divisors (129207240).

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

52919640 is a wasteful number, since it uses less digits than its factorization.

52919640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8681 (or 8674 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 52919640 is about 7274.5886481642. The cubic root of 52919640 is about 375.4386334019.

The spelling of 52919640 in words is "fifty-two million, nine hundred nineteen thousand, six hundred forty".