7900538 has 8 divisors (see below), whose sum is σ = 11959860. Its totient is φ = 3913920.

The previous prime is 7900531. The next prime is 7900547. The reversal of 7900538 is 8350097.

It can be written as a sum of positive squares in 2 ways, for example, as 7414729 + 485809 = 2723^2 + 697^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7900531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17903 + ... + 18338.

Almost surely, 2^7900538 is an apocalyptic number.

7900538 is a deficient number, since it is larger than the sum of its proper divisors (4059322).

7900538 is a wasteful number, since it uses less digits than its factorization.

7900538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36352.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 7900538 is about 2810.7895687867. The cubic root of 7900538 is about 199.1676911144.

The spelling of 7900538 in words is "seven million, nine hundred thousand, five hundred thirty-eight".