78020243 has 8 divisors (see below), whose sum is σ = 90677760. Its totient is φ = 65740680.

The previous prime is 78020233. The next prime is 78020263. The reversal of 78020243 is 34202087.

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 78020243 - 2¹⁴ = 78003859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78020203) 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, 94043 + ... + 94868.

It is an arithmetic number, because the mean of its divisors is an integer number (11334720).

Almost surely, 2^78020243 is an apocalyptic number.

78020243 is a deficient number, since it is larger than the sum of its proper divisors (12657517).

78020243 is a wasteful number, since it uses less digits than its factorization.

78020243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188977.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 78020243 is about 8832.9068261813. The cubic root of 78020243 is about 427.3028271222.

The spelling of 78020243 in words is "seventy-eight million, twenty thousand, two hundred forty-three".