78243995 has 8 divisors (see below), whose sum is σ = 98834640. Its totient is φ = 59300640.

The previous prime is 78243967. The next prime is 78244021. The reversal of 78243995 is 59934287.

It is a happy number.

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

It is not a de Polignac number, because 78243995 - 2⁶ = 78243931 is a prime.

It is a super-2 number, since 2×78243995² = 12244245507120050, which contains 22 as substring.

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, 411716 + ... + 411905.

It is an arithmetic number, because the mean of its divisors is an integer number (12354330).

Almost surely, 2^78243995 is an apocalyptic number.

78243995 is a deficient number, since it is larger than the sum of its proper divisors (20590645).

78243995 is a wasteful number, since it uses less digits than its factorization.

78243995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823645.

The product of its digits is 544320, while the sum is 47.

The square root of 78243995 is about 8845.5635772968. The cubic root of 78243995 is about 427.7109203935.

The spelling of 78243995 in words is "seventy-eight million, two hundred forty-three thousand, nine hundred ninety-five".