7978908 has 72 divisors (see below), whose sum is σ = 22244992. Its totient is φ = 2179296.

The previous prime is 7978903. The next prime is 7978913. The reversal of 7978908 is 8098797.

It is an interprime number because it is at equal distance from previous prime (7978903) and next prime (7978913).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7978903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 169741 + ... + 169787.

Almost surely, 2^7978908 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 7978908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11122496).

7978908 is an abundant number, since it is smaller than the sum of its proper divisors (14266084).

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

7978908 is a wasteful number, since it uses less digits than its factorization.

7978908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 102 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 48.

The square root of 7978908 is about 2824.6960898475. The cubic root of 7978908 is about 199.8240786371.

It can be divided in two parts, 79 and 78908, that added together give a palindrome (78987).

The spelling of 7978908 in words is "seven million, nine hundred seventy-eight thousand, nine hundred eight".