3111990 has 96 divisors (see below), whose sum is σ = 9110880. Its totient is φ = 677376.

The previous prime is 3111973. The next prime is 3112007. The reversal of 3111990 is 991113.

It is an interprime number because it is at equal distance from previous prime (3111973) and next prime (3112007).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 3111990.

It is a congruent number.

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, 42594 + ... + 42666.

It is an arithmetic number, because the mean of its divisors is an integer number (94905).

Almost surely, 2^3111990 is an apocalyptic number.

3111990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3111990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4555440).

3111990 is an abundant number, since it is smaller than the sum of its proper divisors (5998890).

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

3111990 is a wasteful number, since it uses less digits than its factorization.

3111990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 243, while the sum is 24.

The square root of 3111990 is about 1764.0833313650. The cubic root of 3111990 is about 145.9977168593.

It can be divided in two parts, 31 and 11990, that added together give a palindrome (12021).

The spelling of 3111990 in words is "three million, one hundred eleven thousand, nine hundred ninety".