78074938 has 4 divisors (see below), whose sum is σ = 117112410. Its totient is φ = 39037468.

The previous prime is 78074929. The next prime is 78074981. The reversal of 78074938 is 83947087.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 58476609 + 19598329 = 7647^2 + 4427^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19518733 + ... + 19518736.

Almost surely, 2^78074938 is an apocalyptic number.

78074938 is a deficient number, since it is larger than the sum of its proper divisors (39037472).

78074938 is a wasteful number, since it uses less digits than its factorization.

78074938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39037471.

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 78074938 is about 8836.0023766407. The cubic root of 78074938 is about 427.4026553547.

The spelling of 78074938 in words is "seventy-eight million, seventy-four thousand, nine hundred thirty-eight".