7402839 has 4 divisors (see below), whose sum is σ = 9870456. Its totient is φ = 4935224.

The previous prime is 7402783. The next prime is 7402841. The reversal of 7402839 is 9382047.

7402839 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7402839 - 2²⁰ = 6354263 is a prime.

7402839 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7402739) 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, 1233804 + ... + 1233809.

It is an arithmetic number, because the mean of its divisors is an integer number (2467614).

Almost surely, 2^7402839 is an apocalyptic number.

7402839 is a deficient number, since it is larger than the sum of its proper divisors (2467617).

7402839 is a wasteful number, since it uses less digits than its factorization.

7402839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2467616.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 7402839 is about 2720.8158702860. The cubic root of 7402839 is about 194.8944333267.

The spelling of 7402839 in words is "seven million, four hundred two thousand, eight hundred thirty-nine".