52366640 has 40 divisors (see below), whose sum is σ = 122054688. Its totient is φ = 20894720.

The previous prime is 52366637. The next prime is 52366669. The reversal of 52366640 is 4666325.

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

It is a junction number, because it is equal to n+sod(n) for n = 52366597 and 52366606.

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, 59000 + ... + 59880.

Almost surely, 2^52366640 is an apocalyptic number.

It is an amenable number.

52366640 is an abundant number, since it is smaller than the sum of its proper divisors (69688048).

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

52366640 is a wasteful number, since it uses less digits than its factorization.

52366640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1637 (or 1631 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 52366640 is about 7236.4798071991. The cubic root of 52366640 is about 374.1262978181.

The spelling of 52366640 in words is "fifty-two million, three hundred sixty-six thousand, six hundred forty".