78090770 has 16 divisors (see below), whose sum is σ = 142544448. Its totient is φ = 30796080.

The previous prime is 78090763. The next prime is 78090791. The reversal of 78090770 is 7709087.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54284 + ... + 55703.

It is an arithmetic number, because the mean of its divisors is an integer number (8909028).

Almost surely, 2^78090770 is an apocalyptic number.

78090770 is a deficient number, since it is larger than the sum of its proper divisors (64453678).

78090770 is a wasteful number, since it uses less digits than its factorization.

78090770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110065.

The product of its (nonzero) digits is 24696, while the sum is 38.

The square root of 78090770 is about 8836.8982114767. The cubic root of 78090770 is about 427.4315429067.

The spelling of 78090770 in words is "seventy-eight million, ninety thousand, seven hundred seventy".