7944978 has 16 divisors (see below), whose sum is σ = 15998400. Its totient is φ = 2630256.

The previous prime is 7944961. The next prime is 7944991. The reversal of 7944978 is 8794497.

It is a happy number.

7944978 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a d-powerful number, because it can be written as 7 + 9⁴ + 4⁵ + 4⁷ + 9⁵ + 7⁸ + 8⁷ .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3550 + ... + 5337.

It is an arithmetic number, because the mean of its divisors is an integer number (999900).

Almost surely, 2^7944978 is an apocalyptic number.

7944978 is an abundant number, since it is smaller than the sum of its proper divisors (8053422).

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

7944978 is a wasteful number, since it uses less digits than its factorization.

7944978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9041.

The product of its digits is 508032, while the sum is 48.

The square root of 7944978 is about 2818.6837353630. The cubic root of 7944978 is about 199.5404281106.

The spelling of 7944978 in words is "seven million, nine hundred forty-four thousand, nine hundred seventy-eight".