18299390 has 32 divisors (see below), whose sum is σ = 33881760. Its totient is φ = 7113600.

The previous prime is 18299389. The next prime is 18299399. The reversal of 18299390 is 9399281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18299399) 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, 79796 + ... + 80024.

It is an arithmetic number, because the mean of its divisors is an integer number (1058805).

Almost surely, 2^18299390 is an apocalyptic number.

18299390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18299390 is a deficient number, since it is larger than the sum of its proper divisors (15582370).

18299390 is a wasteful number, since it uses less digits than its factorization.

18299390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 18299390 is about 4277.7786291485. The cubic root of 18299390 is about 263.5191641716.

The spelling of 18299390 in words is "eighteen million, two hundred ninety-nine thousand, three hundred ninety".