308401020 has 288 divisors, whose sum is σ = 1056706560. Its totient is φ = 75271680.

The previous prime is 308401019. The next prime is 308401033. The reversal of 308401020 is 20104803.

It is a happy number.

It is a super-2 number, since 2×308401020² = 190222378274080800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 308400984 and 308401002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3465136 + ... + 3465224.

It is an arithmetic number, because the mean of its divisors is an integer number (3669120).

Almost surely, 2^308401020 is an apocalyptic number.

308401020 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 308401020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (528353280).

308401020 is an abundant number, since it is smaller than the sum of its proper divisors (748305540).

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

308401020 is a wasteful number, since it uses less digits than its factorization.

308401020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 308401020 is about 17561.3501758834. The cubic root of 308401020 is about 675.6243112819.

Adding to 308401020 its reverse (20104803), we get a palindrome (328505823).

The spelling of 308401020 in words is "three hundred eight million, four hundred one thousand, twenty".