78299995 has 4 divisors (see below), whose sum is σ = 93960000. Its totient is φ = 62639992.

The previous prime is 78299987. The next prime is 78299999. The reversal of 78299995 is 59999287.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78299995 - 2³ = 78299987 is a prime.

It is a super-2 number, since 2×78299995² = 12261778434000050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (78299999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7829995 + ... + 7830004.

It is an arithmetic number, because the mean of its divisors is an integer number (23490000).

Almost surely, 2^78299995 is an apocalyptic number.

78299995 is a deficient number, since it is larger than the sum of its proper divisors (15660005).

78299995 is a wasteful number, since it uses less digits than its factorization.

78299995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15660004.

The product of its digits is 3674160, while the sum is 58.

The square root of 78299995 is about 8848.7284397251. The cubic root of 78299995 is about 427.8129350364.

The spelling of 78299995 in words is "seventy-eight million, two hundred ninety-nine thousand, nine hundred ninety-five".