7631640 has 192 divisors, whose sum is σ = 27799200. Its totient is φ = 1806336.

The previous prime is 7631633. The next prime is 7631641. The reversal of 7631640 is 461367.

It is a super-3 number, since 3×7631640³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7631641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 177459 + ... + 177501.

Almost surely, 2^7631640 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 7631640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13899600).

7631640 is an abundant number, since it is smaller than the sum of its proper divisors (20167560).

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

7631640 is a wasteful number, since it uses less digits than its factorization.

7631640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 7631640 is about 2762.5423073683. The cubic root of 7631640 is about 196.8819755654.

The spelling of 7631640 in words is "seven million, six hundred thirty-one thousand, six hundred forty".