308673690 has 64 divisors (see below), whose sum is σ = 809778816. Its totient is φ = 74840832.

The previous prime is 308673679. The next prime is 308673713. The reversal of 308673690 is 96376803.

308673690 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×308673690² = 190558893796432200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20224 + ... + 32036.

It is an arithmetic number, because the mean of its divisors is an integer number (12652794).

Almost surely, 2^308673690 is an apocalyptic number.

308673690 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 308673690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (404889408).

308673690 is an abundant number, since it is smaller than the sum of its proper divisors (501105126).

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

308673690 is a wasteful number, since it uses less digits than its factorization.

308673690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11903.

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 308673690 is about 17569.1118159115. Note that the first 3 decimals coincide. The cubic root of 308673690 is about 675.8233683567.

The spelling of 308673690 in words is "three hundred eight million, six hundred seventy-three thousand, six hundred ninety".