7139424 has 48 divisors (see below), whose sum is σ = 19353600. Its totient is φ = 2302080.

The previous prime is 7139401. The next prime is 7139437. The reversal of 7139424 is 4249317.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 7139391 and 7139400.

It is a congruent number.

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, 1777 + ... + 4175.

It is an arithmetic number, because the mean of its divisors is an integer number (403200).

Almost surely, 2^7139424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7139424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9676800).

7139424 is an abundant number, since it is smaller than the sum of its proper divisors (12214176).

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

7139424 is a wasteful number, since it uses less digits than its factorization.

7139424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2443 (or 2435 counting only the distinct ones).

The product of its digits is 6048, while the sum is 30.

The square root of 7139424 is about 2671.9700597125. The cubic root of 7139424 is about 192.5548188172.

The spelling of 7139424 in words is "seven million, one hundred thirty-nine thousand, four hundred twenty-four".