78420895 has 8 divisors (see below), whose sum is σ = 107548704. Its totient is φ = 53774304.

The previous prime is 78420889. The next prime is 78420931. The reversal of 78420895 is 59802487.

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 78420895 - 2⁹ = 78420383 is a prime.

It is a super-2 number, since 2×78420895² = 12299673545202050, which contains 22 as substring.

It is a Duffinian number.

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, 1120264 + ... + 1120333.

It is an arithmetic number, because the mean of its divisors is an integer number (13443588).

Almost surely, 2^78420895 is an apocalyptic number.

78420895 is a deficient number, since it is larger than the sum of its proper divisors (29127809).

78420895 is a wasteful number, since it uses less digits than its factorization.

78420895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240609.

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 78420895 is about 8855.5572947161. The cubic root of 78420895 is about 428.0330116180.

The spelling of 78420895 in words is "seventy-eight million, four hundred twenty thousand, eight hundred ninety-five".