308890 has 32 divisors (see below), whose sum is σ = 622080. Its totient is φ = 109824.

The previous prime is 308887. The next prime is 308899. The reversal of 308890 is 98803.

308890 = 6² + 7² + ... + 97².

It is not an unprimeable number, because it can be changed into a prime (308899) 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, 3871 + ... + 3949.

It is an arithmetic number, because the mean of its divisors is an integer number (19440).

2³⁰⁸⁸⁹⁰ is an apocalyptic number.

308890 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

308890 is a wasteful number, since it uses less digits than its factorization.

308890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 308890 is about 555.7787329504. The cubic root of 308890 is about 67.5981197614.

The spelling of 308890 in words is "three hundred eight thousand, eight hundred ninety".