78075580 has 48 divisors (see below), whose sum is σ = 179536896. Its totient is φ = 28284480.

The previous prime is 78075551. The next prime is 78075581. The reversal of 78075580 is 8557087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78075581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80257 + ... + 81223.

It is an arithmetic number, because the mean of its divisors is an integer number (3740352).

Almost surely, 2^78075580 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 78075580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89768448).

78075580 is an abundant number, since it is smaller than the sum of its proper divisors (101461316).

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

78075580 is a wasteful number, since it uses less digits than its factorization.

78075580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354 (or 1352 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 40.

The square root of 78075580 is about 8836.0387052117. The cubic root of 78075580 is about 427.4038268435.

The spelling of 78075580 in words is "seventy-eight million, seventy-five thousand, five hundred eighty".