7157538 has 16 divisors (see below), whose sum is σ = 15905760. Its totient is φ = 2385828.

The previous prime is 7157503. The next prime is 7157587. The reversal of 7157538 is 8357517.

7157538 is a `hidden beast` number, since 71 + 57 + 538 = 666.

7157538 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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, 66220 + ... + 66327.

It is an arithmetic number, because the mean of its divisors is an integer number (994110).

Almost surely, 2^7157538 is an apocalyptic number.

7157538 is an abundant number, since it is smaller than the sum of its proper divisors (8748222).

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

7157538 is a wasteful number, since it uses less digits than its factorization.

7157538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132558 (or 132552 counting only the distinct ones).

The product of its digits is 29400, while the sum is 36.

The square root of 7157538 is about 2675.3575461983. The cubic root of 7157538 is about 192.7175299966.

The spelling of 7157538 in words is "seven million, one hundred fifty-seven thousand, five hundred thirty-eight".