78044738 has 8 divisors (see below), whose sum is σ = 118670988. Its totient is φ = 38487744.

The previous prime is 78044737. The next prime is 78044741. The reversal of 78044738 is 83744087.

It can be written as a sum of positive squares in 2 ways, for example, as 77668969 + 375769 = 8813^2 + 613^2 .

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

It is a super-2 number, since 2×78044738² = 12181962258977288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78044695 and 78044704.

It is not an unprimeable number, because it can be changed into a prime (78044737) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 267131 + ... + 267422.

Almost surely, 2^78044738 is an apocalyptic number.

78044738 is a deficient number, since it is larger than the sum of its proper divisors (40626250).

78044738 is a wasteful number, since it uses less digits than its factorization.

78044738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534628.

The product of its (nonzero) digits is 150528, while the sum is 41.

The square root of 78044738 is about 8834.2932937502. The cubic root of 78044738 is about 427.3475406784.

The spelling of 78044738 in words is "seventy-eight million, forty-four thousand, seven hundred thirty-eight".