308934780 has 144 divisors (see below), whose sum is σ = 1086812160. Its totient is φ = 64183680.

The previous prime is 308934779. The next prime is 308934823. The reversal of 308934780 is 87439803.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 47781 + ... + 53859.

Almost surely, 2^308934780 is an apocalyptic number.

308934780 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 308934780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (543406080).

308934780 is an abundant number, since it is smaller than the sum of its proper divisors (777877380).

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

308934780 is a wasteful number, since it uses less digits than its factorization.

308934780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6120 (or 6107 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 308934780 is about 17576.5406152633. The cubic root of 308934780 is about 676.0138618588.

The spelling of 308934780 in words is "three hundred eight million, nine hundred thirty-four thousand, seven hundred eighty".