28318390 has 8 divisors (see below), whose sum is σ = 50973120. Its totient is φ = 11327352.

The previous prime is 28318387. The next prime is 28318391. The reversal of 28318390 is 9381382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28318391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1415910 + ... + 1415929.

It is an arithmetic number, because the mean of its divisors is an integer number (6371640).

Almost surely, 2^28318390 is an apocalyptic number.

28318390 is a deficient number, since it is larger than the sum of its proper divisors (22654730).

28318390 is a wasteful number, since it uses less digits than its factorization.

28318390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2831846.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 28318390 is about 5321.5026073469. The cubic root of 28318390 is about 304.8055376012.

The spelling of 28318390 in words is "twenty-eight million, three hundred eighteen thousand, three hundred ninety".