7428578 has 8 divisors (see below), whose sum is σ = 11178972. Its totient is φ = 3702256.

The previous prime is 7428571. The next prime is 7428581. The reversal of 7428578 is 8758247.

It can be written as a sum of positive squares in 2 ways, for example, as 4826809 + 2601769 = 2197^2 + 1613^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×7428578² = 110367542204168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7428571) 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, 5225 + ... + 6492.

Almost surely, 2^7428578 is an apocalyptic number.

7428578 is a deficient number, since it is larger than the sum of its proper divisors (3750394).

7428578 is a wasteful number, since it uses less digits than its factorization.

7428578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12036.

The product of its digits is 125440, while the sum is 41.

The square root of 7428578 is about 2725.5417810043. The cubic root of 7428578 is about 195.1200488049.

The spelling of 7428578 in words is "seven million, four hundred twenty-eight thousand, five hundred seventy-eight".