308421936 has 120 divisors (see below), whose sum is σ = 896420304. Its totient is φ = 98910720.

The previous prime is 308421923. The next prime is 308421937. The reversal of 308421936 is 639124803.

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

It is a self number, because there is not a number n which added to its sum of digits gives 308421936.

It is not an unprimeable number, because it can be changed into a prime (308421937) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 569826 + ... + 570366.

Almost surely, 2^308421936 is an apocalyptic number.

308421936 is a gapful number since it is divisible by the number (36) 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 308421936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (448210152).

308421936 is an abundant number, since it is smaller than the sum of its proper divisors (587998368).

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

308421936 is a wasteful number, since it uses less digits than its factorization.

308421936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699 (or 690 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 308421936 is about 17561.9456780848. The cubic root of 308421936 is about 675.6395847275.

The spelling of 308421936 in words is "three hundred eight million, four hundred twenty-one thousand, nine hundred thirty-six".