3117420 has 96 divisors (see below), whose sum is σ = 10160640. Its totient is φ = 792000.

The previous prime is 3117299. The next prime is 3117421. The reversal of 3117420 is 247113.

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 = 3117393 and 3117402.

It is not an unprimeable number, because it can be changed into a prime (3117421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12295 + ... + 12545.

It is an arithmetic number, because the mean of its divisors is an integer number (105840).

Almost surely, 2^3117420 is an apocalyptic number.

3117420 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 3117420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5080320).

3117420 is an abundant number, since it is smaller than the sum of its proper divisors (7043220).

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

3117420 is a wasteful number, since it uses less digits than its factorization.

3117420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 284 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 3117420 is about 1765.6217035367. The cubic root of 3117420 is about 146.0825829159.

The spelling of 3117420 in words is "three million, one hundred seventeen thousand, four hundred twenty".