8973640 has 32 divisors (see below), whose sum is σ = 21745080. Its totient is φ = 3313152.

The previous prime is 8973617. The next prime is 8973659. The reversal of 8973640 is 463798.

It can be written as a sum of positive squares in 4 ways, for example, as 2951524 + 6022116 = 1718^2 + 2454^2 .

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 8973640.

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, 8109 + ... + 9148.

Almost surely, 2^8973640 is an apocalyptic number.

It is an amenable number.

8973640 is an abundant number, since it is smaller than the sum of its proper divisors (12771440).

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

8973640 is a wasteful number, since it uses less digits than its factorization.

8973640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17281 (or 17277 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 8973640 is about 2995.6034450508. The cubic root of 8973640 is about 207.8051059046.

The spelling of 8973640 in words is "eight million, nine hundred seventy-three thousand, six hundred forty".