1011999744 has 396 divisors, whose sum is σ = 3567577104. Its totient is φ = 285659136.

The previous prime is 1011999727. The next prime is 1011999767. The reversal of 1011999744 is 4479991101.

It is a self number, because there is not a number n which added to its sum of digits gives 1011999744.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 12192727 + ... + 12192809.

Almost surely, 2^1011999744 is an apocalyptic number.

1011999744 is a gapful number since it is divisible by the number (14) 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 1011999744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1783788552).

1011999744 is an abundant number, since it is smaller than the sum of its proper divisors (2555577360).

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

1011999744 is an frugal number, since it uses more digits than its factorization.

1011999744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 1011999744 is about 31811.9434175280. The cubic root of 1011999744 is about 1003.9840211633.

The spelling of 1011999744 in words is "one billion, eleven million, nine hundred ninety-nine thousand, seven hundred forty-four".