78018090 has 16 divisors (see below), whose sum is σ = 187243488. Its totient is φ = 20804816.

The previous prime is 78018053. The next prime is 78018097. The reversal of 78018090 is 9081087.

It is not an unprimeable number, because it can be changed into a prime (78018097) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1300272 + ... + 1300331.

It is an arithmetic number, because the mean of its divisors is an integer number (11702718).

Almost surely, 2^78018090 is an apocalyptic number.

78018090 is an abundant number, since it is smaller than the sum of its proper divisors (109225398).

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

78018090 is a wasteful number, since it uses less digits than its factorization.

78018090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2600613.

The product of its (nonzero) digits is 4032, while the sum is 33.

The square root of 78018090 is about 8832.7849515314. The cubic root of 78018090 is about 427.2988965548.

The spelling of 78018090 in words is "seventy-eight million, eighteen thousand, ninety".