52220440 has 16 divisors (see below), whose sum is σ = 117496080. Its totient is φ = 20888160.

The previous prime is 52220437. The next prime is 52220471. The reversal of 52220440 is 4402225.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 652716 + ... + 652795.

It is an arithmetic number, because the mean of its divisors is an integer number (7343505).

Almost surely, 2^52220440 is an apocalyptic number.

It is an amenable number.

52220440 is an abundant number, since it is smaller than the sum of its proper divisors (65275640).

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

52220440 is a wasteful number, since it uses less digits than its factorization.

52220440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305522 (or 1305518 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 52220440 is about 7226.3711501694. The cubic root of 52220440 is about 373.7778046674. Note that the first 3 decimals are identical.

Adding to 52220440 its reverse (4402225), we get a palindrome (56622665).

The spelling of 52220440 in words is "fifty-two million, two hundred twenty thousand, four hundred forty".