7397978 has 16 divisors (see below), whose sum is σ = 12978240. Its totient is φ = 3096576.

The previous prime is 7397953. The next prime is 7397981. The reversal of 7397978 is 8797937.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5543 + ... + 6746.

It is an arithmetic number, because the mean of its divisors is an integer number (811140).

Almost surely, 2^7397978 is an apocalyptic number.

7397978 is a deficient number, since it is larger than the sum of its proper divisors (5580262).

7397978 is a wasteful number, since it uses less digits than its factorization.

7397978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12341.

The product of its digits is 666792, while the sum is 50.

The square root of 7397978 is about 2719.9224253644. The cubic root of 7397978 is about 194.8517654944.

The spelling of 7397978 in words is "seven million, three hundred ninety-seven thousand, nine hundred seventy-eight".