52290287440 has 40 divisors (see below), whose sum is σ = 125767162440. Its totient is φ = 20194868736.

The previous prime is 52290287419. The next prime is 52290287443. The reversal of 52290287440 is 4478209225.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7510648896 + 44779638544 = 86664^2 + 211612^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52290287443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11267139 + ... + 11271778.

It is an arithmetic number, because the mean of its divisors is an integer number (3144179061).

Almost surely, 2^52290287440 is an apocalyptic number.

It is an amenable number.

52290287440 is an abundant number, since it is smaller than the sum of its proper divisors (73476875000).

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

52290287440 is a wasteful number, since it uses less digits than its factorization.

52290287440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22538959 (or 22538953 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 43.

The spelling of 52290287440 in words is "fifty-two billion, two hundred ninety million, two hundred eighty-seven thousand, four hundred forty".