78508938 has 8 divisors (see below), whose sum is σ = 157017888. Its totient is φ = 26169644.

The previous prime is 78508933. The next prime is 78508939. The reversal of 78508938 is 83980587.

It is a happy number.

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

78508938 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (78508933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6542406 + ... + 6542417.

It is an arithmetic number, because the mean of its divisors is an integer number (19627236).

Almost surely, 2^78508938 is an apocalyptic number.

78508938 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.

78508938 is a wasteful number, since it uses less digits than its factorization.

78508938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13084828.

The product of its (nonzero) digits is 483840, while the sum is 48.

The square root of 78508938 is about 8860.5269594985. The cubic root of 78508938 is about 428.1931356774.

The spelling of 78508938 in words is "seventy-eight million, five hundred eight thousand, nine hundred thirty-eight".