1011100440 has 64 divisors (see below), whose sum is σ = 3466632960. Its totient is φ = 231108480.

The previous prime is 1011100429. The next prime is 1011100469. The reversal of 1011100440 is 440011101.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 601006 + ... + 602685.

It is an arithmetic number, because the mean of its divisors is an integer number (54166140).

Almost surely, 2^1011100440 is an apocalyptic number.

1011100440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011100440 is an abundant number, since it is smaller than the sum of its proper divisors (2455532520).

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

1011100440 is a wasteful number, since it uses less digits than its factorization.

1011100440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203712 (or 1203708 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1011100440 is about 31797.8055846626. The cubic root of 1011100440 is about 1003.6865393932.

Adding to 1011100440 its reverse (440011101), we get a palindrome (1451111541).

The spelling of 1011100440 in words is "one billion, eleven million, one hundred thousand, four hundred forty".