310030020 has 144 divisors (see below), whose sum is σ = 1010475648. Its totient is φ = 76661760.

The previous prime is 310029997. The next prime is 310030031. The reversal of 310030020 is 20030013.

It is a happy number.

It is a super-2 number, since 2×310030020² = 192237226602400800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 310029984 and 310030011.

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, 216547 + ... + 217973.

It is an arithmetic number, because the mean of its divisors is an integer number (7017192).

Almost surely, 2^310030020 is an apocalyptic number.

310030020 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 310030020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (505237824).

310030020 is an abundant number, since it is smaller than the sum of its proper divisors (700445628).

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

310030020 is a wasteful number, since it uses less digits than its factorization.

310030020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1530 (or 1525 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 9.

The square root of 310030020 is about 17607.6693517342. The cubic root of 310030020 is about 676.8117909939.

Adding to 310030020 its reverse (20030013), we get a palindrome (330060033).

The spelling of 310030020 in words is "three hundred ten million, thirty thousand, twenty".