2039540 has 12 divisors (see below), whose sum is σ = 4283076. Its totient is φ = 815808.

The previous prime is 2039509. The next prime is 2039549. The reversal of 2039540 is 459302.

It can be written as a sum of positive squares in 2 ways, for example, as 456976 + 1582564 = 676^2 + 1258^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2039549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50969 + ... + 51008.

It is an arithmetic number, because the mean of its divisors is an integer number (356923).

2^2039540 is an apocalyptic number.

2039540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2039540 is an abundant number, since it is smaller than the sum of its proper divisors (2243536).

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

2039540 is a wasteful number, since it uses less digits than its factorization.

2039540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101986 (or 101984 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 2039540 is about 1428.1246444201. The cubic root of 2039540 is about 126.8169806793.

The spelling of 2039540 in words is "two million, thirty-nine thousand, five hundred forty".