7071428 has 24 divisors (see below), whose sum is σ = 15231552. Its totient is φ = 2797344.

The previous prime is 7071413. The next prime is 7071431. The reversal of 7071428 is 8241707.

It is a self number, because there is not a number n which added to its sum of digits gives 7071428.

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 7 ways as a sum of consecutive naturals, for example, 9350 + ... + 10077.

It is an arithmetic number, because the mean of its divisors is an integer number (634648).

Almost surely, 2^7071428 is an apocalyptic number.

It is an amenable number.

7071428 is an abundant number, since it is smaller than the sum of its proper divisors (8160124).

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

7071428 is a wasteful number, since it uses less digits than its factorization.

7071428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19451 (or 19449 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 7071428 is about 2659.2156738407. The cubic root of 7071428 is about 191.9415693147.

The spelling of 7071428 in words is "seven million, seventy-one thousand, four hundred twenty-eight".