4015540 has 48 divisors (see below), whose sum is σ = 8890560. Its totient is φ = 1521920.

The previous prime is 4015537. The next prime is 4015549. The reversal of 4015540 is 455104.

It is a super-2 number, since 2×4015540² = 32249122983200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4015549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48339 + ... + 48421.

It is an arithmetic number, because the mean of its divisors is an integer number (185220).

Almost surely, 2^4015540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4015540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4445280).

4015540 is an abundant number, since it is smaller than the sum of its proper divisors (4875020).

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

4015540 is a wasteful number, since it uses less digits than its factorization.

4015540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 4015540 is about 2003.8812340056. The cubic root of 4015540 is about 158.9454079950.

The spelling of 4015540 in words is "four million, fifteen thousand, five hundred forty".