78484290 has 16 divisors (see below), whose sum is σ = 188362368. Its totient is φ = 20929136.

The previous prime is 78484283. The next prime is 78484297. The reversal of 78484290 is 9248487.

It is an interprime number because it is at equal distance from previous prime (78484283) and next prime (78484297).

It is not an unprimeable number, because it can be changed into a prime (78484297) 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, 1308042 + ... + 1308101.

It is an arithmetic number, because the mean of its divisors is an integer number (11772648).

Almost surely, 2^78484290 is an apocalyptic number.

78484290 is an abundant number, since it is smaller than the sum of its proper divisors (109878078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78484290 is a wasteful number, since it uses less digits than its factorization.

78484290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2616153.

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 78484290 is about 8859.1359623837. The cubic root of 78484290 is about 428.1483203593.

The spelling of 78484290 in words is "seventy-eight million, four hundred eighty-four thousand, two hundred ninety".