308497728 has 252 divisors, whose sum is σ = 1047512256. Its totient is φ = 79833600.

The previous prime is 308497723. The next prime is 308497741. The reversal of 308497728 is 827794803.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308497723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1138233 + ... + 1138503.

Almost surely, 2^308497728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 308497728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (523756128).

308497728 is an abundant number, since it is smaller than the sum of its proper divisors (739014528).

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

308497728 is a wasteful number, since it uses less digits than its factorization.

308497728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322 (or 294 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 48.

The square root of 308497728 is about 17564.1033930002. The cubic root of 308497728 is about 675.6949243725.

The spelling of 308497728 in words is "three hundred eight million, four hundred ninety-seven thousand, seven hundred twenty-eight".