7947428 has 12 divisors (see below), whose sum is σ = 13950300. Its totient is φ = 3961632.

The previous prime is 7947427. The next prime is 7947431. The reversal of 7947428 is 8247497.

It can be written as a sum of positive squares in 2 ways, for example, as 3247204 + 4700224 = 1802^2 + 2168^2 .

It is a super-2 number, since 2×7947428² = 126323223630368, which contains 22 as substring.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (7947427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1451 + ... + 4242.

It is an arithmetic number, because the mean of its divisors is an integer number (1162525).

Almost surely, 2^7947428 is an apocalyptic number.

It is an amenable number.

7947428 is a deficient number, since it is larger than the sum of its proper divisors (6002872).

7947428 is a wasteful number, since it uses less digits than its factorization.

7947428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6046 (or 6044 counting only the distinct ones).

The product of its digits is 112896, while the sum is 41.

The square root of 7947428 is about 2819.1183018809. The cubic root of 7947428 is about 199.5609368230.

The spelling of 7947428 in words is "seven million, nine hundred forty-seven thousand, four hundred twenty-eight".