7978620 has 96 divisors (see below), whose sum is σ = 24639552. Its totient is φ = 1916928.

The previous prime is 7978609. The next prime is 7978637. The reversal of 7978620 is 268797.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41244 + ... + 41436.

It is an arithmetic number, because the mean of its divisors is an integer number (256662).

Almost surely, 2^7978620 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 7978620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12319776).

7978620 is an abundant number, since it is smaller than the sum of its proper divisors (16660932).

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

7978620 is a wasteful number, since it uses less digits than its factorization.

7978620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271 (or 269 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 7978620 is about 2824.6451104519. The cubic root of 7978620 is about 199.8216743805.

The spelling of 7978620 in words is "seven million, nine hundred seventy-eight thousand, six hundred twenty".