78881550 has 48 divisors (see below), whose sum is σ = 213414912. Its totient is φ = 19122400.

The previous prime is 78881549. The next prime is 78881563. The reversal of 78881550 is 5518887.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 22254 + ... + 25553.

It is an arithmetic number, because the mean of its divisors is an integer number (4446144).

Almost surely, 2^78881550 is an apocalyptic number.

78881550 is an abundant number, since it is smaller than the sum of its proper divisors (134533362).

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

78881550 is a wasteful number, since it uses less digits than its factorization.

78881550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47833 (or 47828 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 42.

The square root of 78881550 is about 8881.5285846525. The cubic root of 78881550 is about 428.8694839355.

The spelling of 78881550 in words is "seventy-eight million, eight hundred eighty-one thousand, five hundred fifty".