7428978 has 24 divisors (see below), whose sum is σ = 16256448. Its totient is φ = 2451672.

The previous prime is 7428937. The next prime is 7428997. The reversal of 7428978 is 8798247.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 150 + ... + 3857.

It is an arithmetic number, because the mean of its divisors is an integer number (677352).

Almost surely, 2^7428978 is an apocalyptic number.

7428978 is an abundant number, since it is smaller than the sum of its proper divisors (8827470).

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

7428978 is a wasteful number, since it uses less digits than its factorization.

7428978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4118 (or 4115 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 7428978 is about 2725.6151599226. The cubic root of 7428978 is about 195.1235508936.

The spelling of 7428978 in words is "seven million, four hundred twenty-eight thousand, nine hundred seventy-eight".