78044038 has 4 divisors (see below), whose sum is σ = 117066060. Its totient is φ = 39022018.

The previous prime is 78044003. The next prime is 78044051. The reversal of 78044038 is 83044087.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83044087 = 7 ⋅11863441.

It is a junction number, because it is equal to n+sod(n) for n = 78043994 and 78044012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19511008 + ... + 19511011.

It is an arithmetic number, because the mean of its divisors is an integer number (29266515).

Almost surely, 2^78044038 is an apocalyptic number.

78044038 is a deficient number, since it is larger than the sum of its proper divisors (39022022).

78044038 is a wasteful number, since it uses less digits than its factorization.

78044038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39022021.

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 78044038 is about 8834.2536753254. The cubic root of 78044038 is about 427.3462630173.

The spelling of 78044038 in words is "seventy-eight million, forty-four thousand, thirty-eight".