308500920 has 512 divisors, whose sum is σ = 1312819200. Its totient is φ = 62705664.

The previous prime is 308500873. The next prime is 308500943. The reversal of 308500920 is 29005803.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4226004 + ... + 4226076.

It is an arithmetic number, because the mean of its divisors is an integer number (2564100).

Almost surely, 2^308500920 is an apocalyptic number.

308500920 is a gapful number since it is divisible by the number (30) 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 308500920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (656409600).

308500920 is an abundant number, since it is smaller than the sum of its proper divisors (1004318280).

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

308500920 is a wasteful number, since it uses less digits than its factorization.

308500920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 308500920 is about 17564.1942599141. The cubic root of 308500920 is about 675.6972548173.

The spelling of 308500920 in words is "three hundred eight million, five hundred thousand, nine hundred twenty".