52124640 has 144 divisors (see below), whose sum is σ = 171161424. Its totient is φ = 13332480.

The previous prime is 52124591. The next prime is 52124641. The reversal of 52124640 is 4642125.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 52124640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52124641) 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, 461224 + ... + 461336.

It is an arithmetic number, because the mean of its divisors is an integer number (1188621).

Almost surely, 2^52124640 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 52124640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85580712).

52124640 is an abundant number, since it is smaller than the sum of its proper divisors (119036784).

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

52124640 is a wasteful number, since it uses less digits than its factorization.

52124640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 52124640 is about 7219.7396074928. The cubic root of 52124640 is about 373.5490958008.

Adding to 52124640 its reverse (4642125), we get a palindrome (56766765).

The spelling of 52124640 in words is "fifty-two million, one hundred twenty-four thousand, six hundred forty".