52447640 has 48 divisors (see below), whose sum is σ = 137278800. Its totient is φ = 17981376.

The previous prime is 52447607. The next prime is 52447673. The reversal of 52447640 is 4674425.

It is an interprime number because it is at equal distance from previous prime (52447607) and next prime (52447673).

It is a junction number, because it is equal to n+sod(n) for n = 52447597 and 52447606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11420 + ... + 15339.

It is an arithmetic number, because the mean of its divisors is an integer number (2859975).

Almost surely, 2^52447640 is an apocalyptic number.

It is an amenable number.

52447640 is an abundant number, since it is smaller than the sum of its proper divisors (84831160).

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

52447640 is a wasteful number, since it uses less digits than its factorization.

52447640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26784 (or 26773 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 32.

The square root of 52447640 is about 7242.0742884895. The cubic root of 52447640 is about 374.3190962537.

The spelling of 52447640 in words is "fifty-two million, four hundred forty-seven thousand, six hundred forty".