1040015540 has 48 divisors (see below), whose sum is σ = 2333352000. Its totient is φ = 388219392.

The previous prime is 1040015533. The next prime is 1040015551. The reversal of 1040015540 is 455100401.

It is a Harshad number since it is a multiple of its sum of digits (20).

1040015540 is a modest number, since divided by 15540 gives 1040 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5036 + ... + 45884.

It is an arithmetic number, because the mean of its divisors is an integer number (48611500).

Almost surely, 2^1040015540 is an apocalyptic number.

1040015540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1040015540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1166676000).

1040015540 is an abundant number, since it is smaller than the sum of its proper divisors (1293336460).

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

1040015540 is a wasteful number, since it uses less digits than its factorization.

1040015540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40944 (or 40942 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1040015540 is about 32249.2719297661. The cubic root of 1040015540 is about 1013.1644501082.

Adding to 1040015540 its reverse (455100401), we get a palindrome (1495115941).

The spelling of 1040015540 in words is "one billion, forty million, fifteen thousand, five hundred forty".