9947478 has 16 divisors (see below), whose sum is σ = 19926720. Its totient is φ = 3310536.

The previous prime is 9947473. The next prime is 9947489. The reversal of 9947478 is 8747499.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9947473) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5301 + ... + 6927.

It is an arithmetic number, because the mean of its divisors is an integer number (1245420).

Almost surely, 2^9947478 is an apocalyptic number.

9947478 is an abundant number, since it is smaller than the sum of its proper divisors (9979242).

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

9947478 is a wasteful number, since it uses less digits than its factorization.

9947478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2651.

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

The square root of 9947478 is about 3153.9622699075. The cubic root of 9947478 is about 215.0656226582.

It can be divided in two parts, 994747 and 8, that added together give a triangular number (994755 = T₁₄₁₀).

The spelling of 9947478 in words is "nine million, nine hundred forty-seven thousand, four hundred seventy-eight".