7145640 has 96 divisors (see below), whose sum is σ = 24261120. Its totient is φ = 1820544.

The previous prime is 7145623. The next prime is 7145641. The reversal of 7145640 is 465417.

7145640 is a `hidden beast` number, since 7 + 14 + 5 + 640 = 666.

It is not an unprimeable number, because it can be changed into a prime (7145641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7849 + ... + 8711.

It is an arithmetic number, because the mean of its divisors is an integer number (252720).

Almost surely, 2^7145640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7145640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12130560).

7145640 is an abundant number, since it is smaller than the sum of its proper divisors (17115480).

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

7145640 is a wasteful number, since it uses less digits than its factorization.

7145640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903 (or 896 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 7145640 is about 2673.1329933245. The cubic root of 7145640 is about 192.6106857682.

The spelling of 7145640 in words is "seven million, one hundred forty-five thousand, six hundred forty".