4087540 has 12 divisors (see below), whose sum is σ = 8583876. Its totient is φ = 1635008.

The previous prime is 4087513. The next prime is 4087597. The reversal of 4087540 is 457804.

4087540 = 515² + 516² + ... + 529².

It can be written as a sum of positive squares in 2 ways, for example, as 1004004 + 3083536 = 1002^2 + 1756^2 .

It is a junction number, because it is equal to n+sod(n) for n = 4087499 and 4087508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102169 + ... + 102208.

It is an arithmetic number, because the mean of its divisors is an integer number (715323).

Almost surely, 2^4087540 is an apocalyptic number.

It is an amenable number.

4087540 is an abundant number, since it is smaller than the sum of its proper divisors (4496336).

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

4087540 is a wasteful number, since it uses less digits than its factorization.

4087540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204386 (or 204384 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 4087540 is about 2021.7665542787. The cubic root of 4087540 is about 159.8897678229.

The spelling of 4087540 in words is "four million, eighty-seven thousand, five hundred forty".