7905538 has 16 divisors (see below), whose sum is σ = 12229560. Its totient is φ = 3830400.

The previous prime is 7905529. The next prime is 7905551. The reversal of 7905538 is 8355097.

It can be written as a sum of positive squares in 4 ways, for example, as 4052169 + 3853369 = 2013^2 + 1963^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7905497 and 7905506.

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, 18568 + ... + 18988.

Almost surely, 2^7905538 is an apocalyptic number.

7905538 is a deficient number, since it is larger than the sum of its proper divisors (4324022).

7905538 is a wasteful number, since it uses less digits than its factorization.

7905538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 7905538 is about 2811.6788579068. The cubic root of 7905538 is about 199.2096978929.

It can be divided in two parts, 790 and 5538, that added together give a triangular number (6328 = T₁₁₂).

The spelling of 7905538 in words is "seven million, nine hundred five thousand, five hundred thirty-eight".