7820142 has 32 divisors (see below), whose sum is σ = 17432064. Its totient is φ = 2318400.

The previous prime is 7820123. The next prime is 7820143. The reversal of 7820142 is 2410287.

It is a super-2 number, since 2×7820142² = 122309241800328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7820143) 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, 1842 + ... + 4362.

It is an arithmetic number, because the mean of its divisors is an integer number (544752).

Almost surely, 2^7820142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7820142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8716032).

7820142 is an abundant number, since it is smaller than the sum of its proper divisors (9611922).

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

7820142 is a wasteful number, since it uses less digits than its factorization.

7820142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2584.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 7820142 is about 2796.4516802548. The cubic root of 7820142 is about 198.4898086459.

The spelling of 7820142 in words is "seven million, eight hundred twenty thousand, one hundred forty-two".