78238329 has 8 divisors (see below), whose sum is σ = 112342272. Its totient is φ = 48146640.

The previous prime is 78238319. The next prime is 78238339. The reversal of 78238329 is 92383287.

It is an interprime number because it is at equal distance from previous prime (78238319) and next prime (78238339).

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

It is not a de Polignac number, because 78238329 - 2⁵ = 78238297 is a prime.

It is a super-2 number, since 2×78238329² = 12242472249424482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78238319) 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, 1003017 + ... + 1003094.

It is an arithmetic number, because the mean of its divisors is an integer number (14042784).

Almost surely, 2^78238329 is an apocalyptic number.

It is an amenable number.

78238329 is a deficient number, since it is larger than the sum of its proper divisors (34103943).

78238329 is a wasteful number, since it uses less digits than its factorization.

78238329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2006127.

The product of its digits is 145152, while the sum is 42.

The square root of 78238329 is about 8845.2432979540. The cubic root of 78238329 is about 427.7005959864.

The spelling of 78238329 in words is "seventy-eight million, two hundred thirty-eight thousand, three hundred twenty-nine".