9940540 has 24 divisors (see below), whose sum is σ = 20935152. Its totient is φ = 3964800.

The previous prime is 9940537. The next prime is 9940561. The reversal of 9940540 is 450499.

It is a happy number.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

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, 11607 + ... + 12433.

It is an arithmetic number, because the mean of its divisors is an integer number (872298).

Almost surely, 2^9940540 is an apocalyptic number.

It is an amenable number.

9940540 is an abundant number, since it is smaller than the sum of its proper divisors (10994612).

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

9940540 is a wasteful number, since it uses less digits than its factorization.

9940540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437 (or 1435 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 9940540 is about 3152.8621917236. The cubic root of 9940540 is about 215.0156109090.

The spelling of 9940540 in words is "nine million, nine hundred forty thousand, five hundred forty".