78894424 has 16 divisors (see below), whose sum is σ = 169059600. Its totient is φ = 33811872.

The previous prime is 78894421. The next prime is 78894427. The reversal of 78894424 is 42449887.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (78894421) and next prime (78894427).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78894421) 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, 704359 + ... + 704470.

It is an arithmetic number, because the mean of its divisors is an integer number (10566225).

Almost surely, 2^78894424 is an apocalyptic number.

It is an amenable number.

78894424 is an abundant number, since it is smaller than the sum of its proper divisors (90165176).

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

78894424 is a wasteful number, since it uses less digits than its factorization.

78894424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1408842 (or 1408838 counting only the distinct ones).

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

The square root of 78894424 is about 8882.2533177117. The cubic root of 78894424 is about 428.8928141286.

The spelling of 78894424 in words is "seventy-eight million, eight hundred ninety-four thousand, four hundred twenty-four".