3117640 has 32 divisors (see below), whose sum is σ = 7189560. Its totient is φ = 1216000.

The previous prime is 3117637. The next prime is 3117661. The reversal of 3117640 is 467113.

3117640 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 933156 + 2184484 = 966^2 + 1478^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 690 + ... + 2590.

Almost surely, 2^3117640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3117640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3594780).

3117640 is an abundant number, since it is smaller than the sum of its proper divisors (4071920).

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

3117640 is a wasteful number, since it uses less digits than its factorization.

3117640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1953 (or 1949 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 3117640 is about 1765.6840034389. The cubic root of 3117640 is about 146.0860192417.

It can be divided in two parts, 31 and 17640, that added together give a palindrome (17671).

The spelling of 3117640 in words is "three million, one hundred seventeen thousand, six hundred forty".