9947540 has 24 divisors (see below), whose sum is σ = 20963880. Its totient is φ = 3964928.

The previous prime is 9947527. The next prime is 9947573. The reversal of 9947540 is 457499.

9947540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 37636 + 9909904 = 194^2 + 3148^2 .

It is a junction number, because it is equal to n+sod(n) for n = 9947494 and 9947503.

It is a congruent number.

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, 6356 + ... + 7764.

It is an arithmetic number, because the mean of its divisors is an integer number (873495).

Almost surely, 2^9947540 is an apocalyptic number.

It is an amenable number.

9947540 is an abundant number, since it is smaller than the sum of its proper divisors (11016340).

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

9947540 is a wasteful number, since it uses less digits than its factorization.

9947540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1771 (or 1769 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 9947540 is about 3153.9720987986. The cubic root of 9947540 is about 215.0660694730.

The spelling of 9947540 in words is "nine million, nine hundred forty-seven thousand, five hundred forty".