1040032440 has 64 divisors (see below), whose sum is σ = 3466778400. Its totient is φ = 277341696.

The previous prime is 1040032381. The next prime is 1040032453. The reversal of 1040032440 is 442300401.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 480417 + ... + 482576.

Almost surely, 2^1040032440 is an apocalyptic number.

1040032440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1040032440 is an abundant number, since it is smaller than the sum of its proper divisors (2426745960).

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

1040032440 is a wasteful number, since it uses less digits than its factorization.

1040032440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963013 (or 963003 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 1040032440 is about 32249.5339501209. The cubic root of 1040032440 is about 1013.1699379706.

Adding to 1040032440 its reverse (442300401), we get a palindrome (1482332841).

The spelling of 1040032440 in words is "one billion, forty million, thirty-two thousand, four hundred forty".