78044780 has 48 divisors (see below), whose sum is σ = 188213760. Its totient is φ = 26884800.

The previous prime is 78044767. The next prime is 78044783. The reversal of 78044780 is 8744087.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (78044783) 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, 5156 + ... + 13515.

It is an arithmetic number, because the mean of its divisors is an integer number (3921120).

Almost surely, 2^78044780 is an apocalyptic number.

It is an amenable number.

78044780 is an abundant number, since it is smaller than the sum of its proper divisors (110168980).

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

78044780 is a wasteful number, since it uses less digits than its factorization.

78044780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18710 (or 18708 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 38.

The square root of 78044780 is about 8834.2956708501. The cubic root of 78044780 is about 427.3476173378.

The spelling of 78044780 in words is "seventy-eight million, forty-four thousand, seven hundred eighty".