7140428 has 24 divisors (see below), whose sum is σ = 13440000. Its totient is φ = 3308688.

The previous prime is 7140403. The next prime is 7140433. The reversal of 7140428 is 8240417.

It is a junction number, because it is equal to n+sod(n) for n = 7140397 and 7140406.

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, 2573 + ... + 4571.

It is an arithmetic number, because the mean of its divisors is an integer number (560000).

Almost surely, 2^7140428 is an apocalyptic number.

It is an amenable number.

7140428 is a deficient number, since it is larger than the sum of its proper divisors (6299572).

7140428 is a wasteful number, since it uses less digits than its factorization.

7140428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2069 (or 2067 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 7140428 is about 2672.1579294645. The cubic root of 7140428 is about 192.5638445676.

The spelling of 7140428 in words is "seven million, one hundred forty thousand, four hundred twenty-eight".