1049991588 has 18 divisors (see below), whose sum is σ = 2654145494. Its totient is φ = 349997184.

The previous prime is 1049991559. The next prime is 1049991599. The reversal of 1049991588 is 8851999401.

1049991588 is a `hidden beast` number, since 10 + 49 + 9 + 9 + 1 + 588 = 666.

It can be written as a sum of positive squares in only one way, i.e., 937461924 + 112529664 = 30618^2 + 10608^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×1049991588² = 2204964669741523488, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14583181 + ... + 14583252.

Almost surely, 2^1049991588 is an apocalyptic number.

1049991588 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1049991588 is an abundant number, since it is smaller than the sum of its proper divisors (1604153906).

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

1049991588 is a wasteful number, since it uses less digits than its factorization.

1049991588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29166443 (or 29166438 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 54.

The square root of 1049991588 is about 32403.5736918013. The cubic root of 1049991588 is about 1016.3936425453.

The spelling of 1049991588 in words is "one billion, forty-nine million, nine hundred ninety-one thousand, five hundred eighty-eight".