7999420 has 48 divisors (see below), whose sum is σ = 19742688. Its totient is φ = 2684160.

The previous prime is 7999417. The next prime is 7999451. The reversal of 7999420 is 249997.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1462 + ... + 4258.

It is an arithmetic number, because the mean of its divisors is an integer number (411306).

Almost surely, 2^7999420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7999420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9871344).

7999420 is an abundant number, since it is smaller than the sum of its proper divisors (11743268).

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

7999420 is a wasteful number, since it uses less digits than its factorization.

7999420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2830 (or 2828 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 7999420 is about 2828.3245924045. The cubic root of 7999420 is about 199.9951665499.

It can be divided in two parts, 79 and 99420, that added together give a palindrome (99499).

The spelling of 7999420 in words is "seven million, nine hundred ninety-nine thousand, four hundred twenty".