78550830 has 64 divisors (see below), whose sum is σ = 213062400. Its totient is φ = 20587680.

The previous prime is 78550783. The next prime is 78550861. The reversal of 78550830 is 3805587.

It is a happy number.

78550830 is a `hidden beast` number, since 78 + 550 + 8 + 30 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13465 + ... + 18395.

It is an arithmetic number, because the mean of its divisors is an integer number (3329100).

Almost surely, 2^78550830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78550830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106531200).

78550830 is an abundant number, since it is smaller than the sum of its proper divisors (134511570).

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

78550830 is a wasteful number, since it uses less digits than its factorization.

78550830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5006 (or 5000 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 78550830 is about 8862.8906119843. The cubic root of 78550830 is about 428.2692827494.

It can be divided in two parts, 785 and 50830, that added together give a palindrome (51615).

The spelling of 78550830 in words is "seventy-eight million, five hundred fifty thousand, eight hundred thirty".