1081992012 has 24 divisors (see below), whose sum is σ = 2657524800. Its totient is φ = 341681616.

The previous prime is 1081992007. The next prime is 1081992017. The reversal of 1081992012 is 2102991801.

It is an interprime number because it is at equal distance from previous prime (1081992007) and next prime (1081992017).

It is not an unprimeable number, because it can be changed into a prime (1081992017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2372562 + ... + 2373017.

It is an arithmetic number, because the mean of its divisors is an integer number (110730200).

Almost surely, 2^1081992012 is an apocalyptic number.

1081992012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1081992012 is an abundant number, since it is smaller than the sum of its proper divisors (1575532788).

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

1081992012 is a wasteful number, since it uses less digits than its factorization.

1081992012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4745605 (or 4745603 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 33.

The square root of 1081992012 is about 32893.6469853983. The cubic root of 1081992012 is about 1026.6159755055.

It can be divided in two parts, 10819 and 92012, that added together give a triangular number (102831 = T₄₅₃).

The spelling of 1081992012 in words is "one billion, eighty-one million, nine hundred ninety-two thousand, twelve".