538078640 has 40 divisors (see below), whose sum is σ = 1364765328. Its totient is φ = 195664640.

The previous prime is 538078633. The next prime is 538078649. The reversal of 538078640 is 46870835.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (538078649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304847 + ... + 306606.

Almost surely, 2^538078640 is an apocalyptic number.

It is an amenable number.

538078640 is an abundant number, since it is smaller than the sum of its proper divisors (826686688).

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

538078640 is a wasteful number, since it uses less digits than its factorization.

538078640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611477 (or 611471 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 538078640 is about 23196.5221531160. The cubic root of 538078640 is about 813.3583273397.

The spelling of 538078640 in words is "five hundred thirty-eight million, seventy-eight thousand, six hundred forty".