7641918 has 32 divisors (see below), whose sum is σ = 17349120. Its totient is φ = 2492280.

The previous prime is 7641913. The next prime is 7641923. The reversal of 7641918 is 8191467.

7641918 is a `hidden beast` number, since 7 + 641 + 9 + 1 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (7641913) and next prime (7641923).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7641913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1033 + ... + 4043.

It is an arithmetic number, because the mean of its divisors is an integer number (542160).

Almost surely, 2^7641918 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7641918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8674560).

7641918 is an abundant number, since it is smaller than the sum of its proper divisors (9707202).

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

7641918 is a wasteful number, since it uses less digits than its factorization.

7641918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3069 (or 3063 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 7641918 is about 2764.4019244676. The cubic root of 7641918 is about 196.9703202816.

The spelling of 7641918 in words is "seven million, six hundred forty-one thousand, nine hundred eighteen".