7138528 has 48 divisors (see below), whose sum is σ = 15120000. Its totient is φ = 3307392.

The previous prime is 7138513. The next prime is 7138541. The reversal of 7138528 is 8258317.

It is a junction number, because it is equal to n+sod(n) for n = 7138493 and 7138502.

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, 35773 + ... + 35971.

It is an arithmetic number, because the mean of its divisors is an integer number (315000).

Almost surely, 2^7138528 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 7138528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7560000).

7138528 is an abundant number, since it is smaller than the sum of its proper divisors (7981472).

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

7138528 is a wasteful number, since it uses less digits than its factorization.

7138528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287 (or 279 counting only the distinct ones).

The product of its digits is 13440, while the sum is 34.

The square root of 7138528 is about 2671.8023879022. The cubic root of 7138528 is about 192.5467632497.

The spelling of 7138528 in words is "seven million, one hundred thirty-eight thousand, five hundred twenty-eight".