78550472 has 128 divisors (see below), whose sum is σ = 209744640. Its totient is φ = 26542080.

The previous prime is 78550463. The next prime is 78550487. The reversal of 78550472 is 27405587.

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, 135848 + ... + 136424.

It is an arithmetic number, because the mean of its divisors is an integer number (1638630).

Almost surely, 2^78550472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78550472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104872320).

78550472 is an abundant number, since it is smaller than the sum of its proper divisors (131194168).

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

78550472 is a wasteful number, since it uses less digits than its factorization.

78550472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631 (or 627 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 38.

The square root of 78550472 is about 8862.8704153903. The cubic root of 78550472 is about 428.2686321277.

The spelling of 78550472 in words is "seventy-eight million, five hundred fifty thousand, four hundred seventy-two".