78415089 has 8 divisors (see below), whose sum is σ = 107926272. Its totient is φ = 50590320.

The previous prime is 78415081. The next prime is 78415097. The reversal of 78415089 is 98051487.

It is an interprime number because it is at equal distance from previous prime (78415081) and next prime (78415097).

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

It is not a de Polignac number, because 78415089 - 2³ = 78415081 is a prime.

It is a super-2 number, since 2×78415089² = 12297852365755842, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78415089.

It is not an unprimeable number, because it can be changed into a prime (78415081) 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, 421494 + ... + 421679.

It is an arithmetic number, because the mean of its divisors is an integer number (13490784).

Almost surely, 2^78415089 is an apocalyptic number.

It is an amenable number.

78415089 is a deficient number, since it is larger than the sum of its proper divisors (29511183).

78415089 is a wasteful number, since it uses less digits than its factorization.

78415089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843207.

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 78415089 is about 8855.2294718996. The cubic root of 78415089 is about 428.0224480176.

The spelling of 78415089 in words is "seventy-eight million, four hundred fifteen thousand, eighty-nine".