7640022 has 32 divisors (see below), whose sum is σ = 16863840. Its totient is φ = 2292480.

The previous prime is 7639999. The next prime is 7640023. The reversal of 7640022 is 2200467.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7640023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2004 + ... + 4392.

It is an arithmetic number, because the mean of its divisors is an integer number (526995).

Almost surely, 2^7640022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7640022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8431920).

7640022 is an abundant number, since it is smaller than the sum of its proper divisors (9223818).

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

7640022 is a wasteful number, since it uses less digits than its factorization.

7640022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2448.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 7640022 is about 2764.0589718745. The cubic root of 7640022 is about 196.9540291438.

Adding to 7640022 its reverse (2200467), we get a palindrome (9840489).

The spelling of 7640022 in words is "seven million, six hundred forty thousand, twenty-two".