7984978 has 8 divisors (see below), whose sum is σ = 12607920. Its totient is φ = 3782340.

The previous prime is 7984957. The next prime is 7985009. The reversal of 7984978 is 8794897.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105028 + ... + 105103.

It is an arithmetic number, because the mean of its divisors is an integer number (1575990).

Almost surely, 2^7984978 is an apocalyptic number.

7984978 is a deficient number, since it is larger than the sum of its proper divisors (4622942).

7984978 is a wasteful number, since it uses less digits than its factorization.

7984978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210152.

The product of its digits is 1016064, while the sum is 52.

The square root of 7984978 is about 2825.7703374478. The cubic root of 7984978 is about 199.8747382305.

It can be divided in two parts, 798 and 4978, that added together give a square (5776 = 76²).

The spelling of 7984978 in words is "seven million, nine hundred eighty-four thousand, nine hundred seventy-eight".