18078090 has 16 divisors (see below), whose sum is σ = 43387488. Its totient is φ = 4820816.

The previous prime is 18078083. The next prime is 18078097. The reversal of 18078090 is 9087081.

It is an interprime number because it is at equal distance from previous prime (18078083) and next prime (18078097).

It is not an unprimeable number, because it can be changed into a prime (18078097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301272 + ... + 301331.

It is an arithmetic number, because the mean of its divisors is an integer number (2711718).

Almost surely, 2^18078090 is an apocalyptic number.

18078090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18078090 is an abundant number, since it is smaller than the sum of its proper divisors (25309398).

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

18078090 is a wasteful number, since it uses less digits than its factorization.

18078090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602613.

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

The square root of 18078090 is about 4251.8337220545. The cubic root of 18078090 is about 262.4525810037.

The spelling of 18078090 in words is "eighteen million, seventy-eight thousand, ninety".