78843996 has 192 divisors, whose sum is σ = 268800000. Its totient is φ = 19362240.

The previous prime is 78843991. The next prime is 78844027. The reversal of 78843996 is 69934887.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78843991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 157755 + ... + 158253.

It is an arithmetic number, because the mean of its divisors is an integer number (1400000).

Almost surely, 2^78843996 is an apocalyptic number.

78843996 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78843996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134400000).

78843996 is an abundant number, since it is smaller than the sum of its proper divisors (189956004).

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

78843996 is a wasteful number, since it uses less digits than its factorization.

78843996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549 (or 541 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 78843996 is about 8879.4141698650. The cubic root of 78843996 is about 428.8014142742.

The spelling of 78843996 in words is "seventy-eight million, eight hundred forty-three thousand, nine hundred ninety-six".