78424984 has 32 divisors (see below), whose sum is σ = 161663040. Its totient is φ = 35370400.

The previous prime is 78424981. The next prime is 78424987. The reversal of 78424984 is 48942487.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (78424981) and next prime (78424987).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78424981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8127 + ... + 14929.

It is an arithmetic number, because the mean of its divisors is an integer number (5051970).

Almost surely, 2^78424984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78424984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80831520).

78424984 is an abundant number, since it is smaller than the sum of its proper divisors (83238056).

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

78424984 is a wasteful number, since it uses less digits than its factorization.

78424984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6951 (or 6947 counting only the distinct ones).

The product of its digits is 516096, while the sum is 46.

The square root of 78424984 is about 8855.7881636814. The cubic root of 78424984 is about 428.0404509472.

The spelling of 78424984 in words is "seventy-eight million, four hundred twenty-four thousand, nine hundred eighty-four".