7642818 has 12 divisors (see below), whose sum is σ = 16559478. Its totient is φ = 2547600.

The previous prime is 7642813. The next prime is 7642829. The reversal of 7642818 is 8182467.

7642818 is a `hidden beast` number, since 7 + 642 + 8 + 1 + 8 = 666.

7642818 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 7634169 + 8649 = 2763^2 + 93^2 .

It is a super-2 number, since 2×7642818² = 116825333962248, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7642813) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 212283 + ... + 212318.

Almost surely, 2^7642818 is an apocalyptic number.

7642818 is an abundant number, since it is smaller than the sum of its proper divisors (8916660).

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

7642818 is a wasteful number, since it uses less digits than its factorization.

7642818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424609 (or 424606 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 7642818 is about 2764.5647035293. The cubic root of 7642818 is about 196.9780524735.

The spelling of 7642818 in words is "seven million, six hundred forty-two thousand, eight hundred eighteen".