7868420 has 96 divisors (see below), whose sum is σ = 20428800. Its totient is φ = 2540160.

The previous prime is 7868381. The next prime is 7868423. The reversal of 7868420 is 248687.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (7868423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 212642 + ... + 212678.

It is an arithmetic number, because the mean of its divisors is an integer number (212800).

Almost surely, 2^7868420 is an apocalyptic number.

7868420 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7868420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10214400).

7868420 is an abundant number, since it is smaller than the sum of its proper divisors (12560380).

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

7868420 is a wasteful number, since it uses less digits than its factorization.

7868420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98 (or 82 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 7868420 is about 2805.0704090985. The cubic root of 7868420 is about 198.8974328984.

The spelling of 7868420 in words is "seven million, eight hundred sixty-eight thousand, four hundred twenty".