308085988 has 48 divisors (see below), whose sum is σ = 657569920. Its totient is φ = 123358464.

The previous prime is 308085977. The next prime is 308086003. The reversal of 308085988 is 889580803.

It is a super-2 number, since 2×308085988² = 189833952003872288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34870 + ... + 42802.

Almost surely, 2^308085988 is an apocalyptic number.

308085988 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 308085988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328784960).

308085988 is an abundant number, since it is smaller than the sum of its proper divisors (349483932).

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

308085988 is a wasteful number, since it uses less digits than its factorization.

308085988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8036 (or 8034 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 49.

The square root of 308085988 is about 17552.3784143346. The cubic root of 308085988 is about 675.3941825657.

The spelling of 308085988 in words is "three hundred eight million, eighty-five thousand, nine hundred eighty-eight".