78049045 has 8 divisors (see below), whose sum is σ = 94942296. Its totient is φ = 61583616.

The previous prime is 78049043. The next prime is 78049067. The reversal of 78049045 is 54094087.

It can be written as a sum of positive squares in 4 ways, for example, as 6036849 + 72012196 = 2457^2 + 8486^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 78049045 - 2¹ = 78049043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78048995 and 78049013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78049043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106552 + ... + 107281.

It is an arithmetic number, because the mean of its divisors is an integer number (11867787).

Almost surely, 2^78049045 is an apocalyptic number.

It is an amenable number.

78049045 is a deficient number, since it is larger than the sum of its proper divisors (16893251).

78049045 is a wasteful number, since it uses less digits than its factorization.

78049045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213911.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 78049045 is about 8834.5370563488. The cubic root of 78049045 is about 427.3554017764.

The spelling of 78049045 in words is "seventy-eight million, forty-nine thousand, forty-five".