52406442 has 48 divisors (see below), whose sum is σ = 125929440. Its totient is φ = 15616800.

The previous prime is 52406401. The next prime is 52406447. The reversal of 52406442 is 24460425.

It is not an unprimeable number, because it can be changed into a prime (52406447) 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, 9909 + ... + 14247.

It is an arithmetic number, because the mean of its divisors is an integer number (2623530).

Almost surely, 2^52406442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52406442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62964720).

52406442 is an abundant number, since it is smaller than the sum of its proper divisors (73522998).

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

52406442 is a wasteful number, since it uses less digits than its factorization.

52406442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4419 (or 4416 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 52406442 is about 7239.2293788773. The cubic root of 52406442 is about 374.2210604621.

Adding to 52406442 its reverse (24460425), we get a palindrome (76866867).

The spelling of 52406442 in words is "fifty-two million, four hundred six thousand, four hundred forty-two".