78328994 has 8 divisors (see below), whose sum is σ = 117531648. Its totient is φ = 39151780.

The previous prime is 78328993. The next prime is 78329011. The reversal of 78328994 is 49982387.

It is a happy number.

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

It is a super-2 number, since 2×78328994² = 12270862602104072, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78328993) 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, 6719 + ... + 14205.

It is an arithmetic number, because the mean of its divisors is an integer number (14691456).

Almost surely, 2^78328994 is an apocalyptic number.

78328994 is a deficient number, since it is larger than the sum of its proper divisors (39202654).

78328994 is a wasteful number, since it uses less digits than its factorization.

78328994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12720.

The product of its digits is 870912, while the sum is 50.

The square root of 78328994 is about 8850.3668850506. The cubic root of 78328994 is about 427.8657431115.

The spelling of 78328994 in words is "seventy-eight million, three hundred twenty-eight thousand, nine hundred ninety-four".