3100020 has 144 divisors (see below), whose sum is σ = 11082624. Its totient is φ = 633600.

The previous prime is 3100007. The next prime is 3100043. The reversal of 3100020 is 200013.

3100020 = T₂₁ + T₂₂ + ... + T₂₆₄.

It is a super-2 number, since 2×3100020² = 19220248000800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a junction number, because it is equal to n+sod(n) for n = 3099981 and 3100008.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 50790 + ... + 50850.

Almost surely, 2^3100020 is an apocalyptic number.

3100020 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 3100020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5541312).

3100020 is an abundant number, since it is smaller than the sum of its proper divisors (7982604).

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

3100020 is a wasteful number, since it uses less digits than its factorization.

3100020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 6.

The square root of 3100020 is about 1760.6873657751. The cubic root of 3100020 is about 145.8102871518.

Adding to 3100020 its reverse (200013), we get a palindrome (3300033).

The spelling of 3100020 in words is "three million, one hundred thousand, twenty".