1012003440 has 80 divisors (see below), whose sum is σ = 3585389568. Its totient is φ = 231314688.

The previous prime is 1012003439. The next prime is 1012003493. The reversal of 1012003440 is 443002101.

1012003440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 299512 + ... + 302871.

Almost surely, 2^1012003440 is an apocalyptic number.

1012003440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1012003440 is an abundant number, since it is smaller than the sum of its proper divisors (2573386128).

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

1012003440 is a wasteful number, since it uses less digits than its factorization.

1012003440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602406 (or 602400 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1012003440 is about 31812.0015088645. The cubic root of 1012003440 is about 1003.9852434036.

Subtracting from 1012003440 its product of nonzero digits (96), we obtain a square (1012003344 = 31812²).

Adding to 1012003440 its reverse (443002101), we get a palindrome (1455005541).

The spelling of 1012003440 in words is "one billion, twelve million, three thousand, four hundred forty".