7428839 has 8 divisors (see below), whose sum is σ = 8456832. Its totient is φ = 6459640.

The previous prime is 7428833. The next prime is 7428859. The reversal of 7428839 is 9388247.

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

It is not a de Polignac number, because 7428839 - 2²⁰ = 6380263 is a prime.

It is a d-powerful number, because it can be written as 7⁸ + 4⁶ + 2 + 8⁵ + 8⁵ + 3¹³ + 9² .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7428796 and 7428805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7428833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14429 + ... + 14934.

It is an arithmetic number, because the mean of its divisors is an integer number (1057104).

Almost surely, 2^7428839 is an apocalyptic number.

7428839 is a deficient number, since it is larger than the sum of its proper divisors (1027993).

7428839 is a wasteful number, since it uses less digits than its factorization.

7428839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29397.

The product of its digits is 96768, while the sum is 41.

The square root of 7428839 is about 2725.5896609725. The cubic root of 7428839 is about 195.1223339320.

The spelling of 7428839 in words is "seven million, four hundred twenty-eight thousand, eight hundred thirty-nine".