7973540 has 24 divisors (see below), whose sum is σ = 17626560. Its totient is φ = 3021408.

The previous prime is 7973519. The next prime is 7973543. The reversal of 7973540 is 453797.

It is a self number, because there is not a number n which added to its sum of digits gives 7973540.

It is not an unprimeable number, because it can be changed into a prime (7973543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10112 + ... + 10871.

It is an arithmetic number, because the mean of its divisors is an integer number (734440).

Almost surely, 2^7973540 is an apocalyptic number.

It is an amenable number.

7973540 is an abundant number, since it is smaller than the sum of its proper divisors (9653020).

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

7973540 is a wasteful number, since it uses less digits than its factorization.

7973540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21011 (or 21009 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 7973540 is about 2823.7457392619. The cubic root of 7973540 is about 199.7792564511.

Adding to 7973540 its product of nonzero digits (26460), we get a cube (8000000 = 200³).

The spelling of 7973540 in words is "seven million, nine hundred seventy-three thousand, five hundred forty".