308545920 has 384 divisors, whose sum is σ = 1185762240. Its totient is φ = 73531392.

The previous prime is 308545901. The next prime is 308545967. The reversal of 308545920 is 29545803.

308545920 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2252092 + ... + 2252228.

Almost surely, 2^308545920 is an apocalyptic number.

308545920 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 308545920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (592881120).

308545920 is an abundant number, since it is smaller than the sum of its proper divisors (877216320).

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

308545920 is a wasteful number, since it uses less digits than its factorization.

308545920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 308545920 is about 17565.4752284133. The cubic root of 308545920 is about 675.7301071214.

The spelling of 308545920 in words is "three hundred eight million, five hundred forty-five thousand, nine hundred twenty".