3140820 has 36 divisors (see below), whose sum is σ = 9527700. Its totient is φ = 837504.

The previous prime is 3140807. The next prime is 3140821. The reversal of 3140820 is 280413.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2414916 + 725904 = 1554^2 + 852^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 = 3140793 and 3140802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3140821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8545 + ... + 8904.

Almost surely, 2^3140820 is an apocalyptic number.

3140820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3140820 is an abundant number, since it is smaller than the sum of its proper divisors (6386880).

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

3140820 is a wasteful number, since it uses less digits than its factorization.

3140820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17464 (or 17459 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 3140820 is about 1772.2358759488. The cubic root of 3140820 is about 146.4471808874.

The spelling of 3140820 in words is "three million, one hundred forty thousand, eight hundred twenty".