78523378 has 8 divisors (see below), whose sum is σ = 117825372. Its totient is φ = 39248256.

The previous prime is 78523351. The next prime is 78523433. The reversal of 78523378 is 87332587.

It can be written as a sum of positive squares in 2 ways, for example, as 70610409 + 7912969 = 8403^2 + 2813^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4026 + ... + 13162.

Almost surely, 2^78523378 is an apocalyptic number.

78523378 is a deficient number, since it is larger than the sum of its proper divisors (39301994).

78523378 is a wasteful number, since it uses less digits than its factorization.

78523378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13436.

The product of its digits is 282240, while the sum is 43.

The square root of 78523378 is about 8861.3417719892. The cubic root of 78523378 is about 428.2193863184.

The spelling of 78523378 in words is "seventy-eight million, five hundred twenty-three thousand, three hundred seventy-eight".