78043554 has 64 divisors (see below), whose sum is σ = 186900480. Its totient is φ = 24068880.

The previous prime is 78043519. The next prime is 78043571. The reversal of 78043554 is 45534087.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 37489 + ... + 39515.

It is an arithmetic number, because the mean of its divisors is an integer number (2920320).

Almost surely, 2^78043554 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78043554, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93450240).

78043554 is an abundant number, since it is smaller than the sum of its proper divisors (108856926).

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

78043554 is a wasteful number, since it uses less digits than its factorization.

78043554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2092 (or 2086 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The square root of 78043554 is about 8834.2262819106. The cubic root of 78043554 is about 427.3453796015.

The spelling of 78043554 in words is "seventy-eight million, forty-three thousand, five hundred fifty-four".