7820118 has 16 divisors (see below), whose sum is σ = 17378160. Its totient is φ = 2606688.

The previous prime is 7820107. The next prime is 7820123. The reversal of 7820118 is 8110287.

It is a super-2 number, since 2×7820118² = 122308491067848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 7820091 and 7820100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72355 + ... + 72462.

It is an arithmetic number, because the mean of its divisors is an integer number (1086135).

Almost surely, 2^7820118 is an apocalyptic number.

7820118 is an abundant number, since it is smaller than the sum of its proper divisors (9558042).

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

7820118 is a wasteful number, since it uses less digits than its factorization.

7820118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144828 (or 144822 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 7820118 is about 2796.4473890992. The cubic root of 7820118 is about 198.4896055907.

The spelling of 7820118 in words is "seven million, eight hundred twenty thousand, one hundred eighteen".