1011445440 has 56 divisors (see below), whose sum is σ = 3211342320. Its totient is φ = 269718528.

The previous prime is 1011445439. The next prime is 1011445459. The reversal of 1011445440 is 445441101.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1011445440.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 525835 + ... + 527754.

Almost surely, 2^1011445440 is an apocalyptic number.

1011445440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011445440 is an abundant number, since it is smaller than the sum of its proper divisors (2199896880).

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

1011445440 is a wasteful number, since it uses less digits than its factorization.

1011445440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053609 (or 1053599 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 1011445440 is about 31803.2300246374. The cubic root of 1011445440 is about 1003.8006831735.

Adding to 1011445440 its reverse (445441101), we get a palindrome (1456886541).

The spelling of 1011445440 in words is "one billion, eleven million, four hundred forty-five thousand, four hundred forty".