52533640 has 32 divisors (see below), whose sum is σ = 119295000. Its totient is φ = 20818944.

The previous prime is 52533629. The next prime is 52533661. The reversal of 52533640 is 4633525.

It can be written as a sum of positive squares in 4 ways, for example, as 48916036 + 3617604 = 6994^2 + 1902^2 .

It is a junction number, because it is equal to n+sod(n) for n = 52533599 and 52533608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1665 + ... + 10384.

Almost surely, 2^52533640 is an apocalyptic number.

It is an amenable number.

52533640 is an abundant number, since it is smaller than the sum of its proper divisors (66761360).

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

52533640 is a wasteful number, since it uses less digits than its factorization.

52533640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12169 (or 12165 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 52533640 is about 7248.0093818924. The cubic root of 52533640 is about 374.5235786873.

The spelling of 52533640 in words is "fifty-two million, five hundred thirty-three thousand, six hundred forty".