1081091892 has 24 divisors (see below), whose sum is σ = 2603921152. Its totient is φ = 348739200.

The previous prime is 1081091881. The next prime is 1081091903. The reversal of 1081091892 is 2981901801.

It is an interprime number because it is at equal distance from previous prime (1081091881) and next prime (1081091903).

It is a self number, because there is not a number n which added to its sum of digits gives 1081091892.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 1452709 + ... + 1453452.

Almost surely, 2^1081091892 is an apocalyptic number.

1081091892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1081091892 is an abundant number, since it is smaller than the sum of its proper divisors (1522829260).

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

1081091892 is a wasteful number, since it uses less digits than its factorization.

1081091892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2906199 (or 2906197 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 39.

The square root of 1081091892 is about 32879.9618612917. The cubic root of 1081091892 is about 1026.3312124851.

The spelling of 1081091892 in words is "one billion, eighty-one million, ninety-one thousand, eight hundred ninety-two".