78709045 has 8 divisors (see below), whose sum is σ = 97707960. Its totient is φ = 60795840.

The previous prime is 78709021. The next prime is 78709051. The reversal of 78709045 is 54090787.

It can be written as a sum of positive squares in 4 ways, for example, as 13793796 + 64915249 = 3714^2 + 8057^2 .

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

It is not a de Polignac number, because 78709045 - 2¹¹ = 78706997 is a prime.

It is a super-2 number, since 2×78709045² = 12390227529624050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78708989 and 78709007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271266 + ... + 271555.

It is an arithmetic number, because the mean of its divisors is an integer number (12213495).

Almost surely, 2^78709045 is an apocalyptic number.

It is an amenable number.

78709045 is a deficient number, since it is larger than the sum of its proper divisors (18998915).

78709045 is a wasteful number, since it uses less digits than its factorization.

78709045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542855.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 78709045 is about 8871.8118217194. The cubic root of 78709045 is about 428.5566261290.

The spelling of 78709045 in words is "seventy-eight million, seven hundred nine thousand, forty-five".