3156440 has 32 divisors (see below), whose sum is σ = 8117280. Its totient is φ = 1082112.

The previous prime is 3156431. The next prime is 3156443. The reversal of 3156440 is 446513.

It is a happy number.

It is a super-2 number, since 2×3156440² = 19926226947200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3156443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5357 + ... + 5916.

It is an arithmetic number, because the mean of its divisors is an integer number (253665).

Almost surely, 2^3156440 is an apocalyptic number.

It is an amenable number.

3156440 is an abundant number, since it is smaller than the sum of its proper divisors (4960840).

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

3156440 is a wasteful number, since it uses less digits than its factorization.

3156440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11291 (or 11287 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 3156440 is about 1776.6372730527. The cubic root of 3156440 is about 146.6895510664.

The spelling of 3156440 in words is "three million, one hundred fifty-six thousand, four hundred forty".