308485890 has 48 divisors (see below), whose sum is σ = 836941248. Its totient is φ = 78685728.

The previous prime is 308485883. The next prime is 308485901. The reversal of 308485890 is 98584803.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72444 + ... + 76583.

It is an arithmetic number, because the mean of its divisors is an integer number (17436276).

Almost surely, 2^308485890 is an apocalyptic number.

308485890 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

308485890 is an abundant number, since it is smaller than the sum of its proper divisors (528455358).

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

308485890 is a wasteful number, since it uses less digits than its factorization.

308485890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149063 (or 149060 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 308485890 is about 17563.7663956226. The cubic root of 308485890 is about 675.6862814360.

The spelling of 308485890 in words is "three hundred eight million, four hundred eighty-five thousand, eight hundred ninety".