78038538 has 8 divisors (see below), whose sum is σ = 156077088. Its totient is φ = 26012844.

The previous prime is 78038531. The next prime is 78038549. The reversal of 78038538 is 83583087.

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

78038538 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 78038538.

It is not an unprimeable number, because it can be changed into a prime (78038531) 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 3 ways as a sum of consecutive naturals, for example, 6503206 + ... + 6503217.

It is an arithmetic number, because the mean of its divisors is an integer number (19509636).

Almost surely, 2^78038538 is an apocalyptic number.

78038538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

78038538 is a wasteful number, since it uses less digits than its factorization.

78038538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13006428.

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 78038538 is about 8833.9423815191. The cubic root of 78038538 is about 427.3362239858.

The spelling of 78038538 in words is "seventy-eight million, thirty-eight thousand, five hundred thirty-eight".